Update: RICHARD FROM SLOVAKIA HAS HAD HIS TARMAC FRAME WITH THE ST CRACK REPLACED UNDER WARRANTY BY SPECIALIZED! 🍻🍻👍 Finally some good news from the industry!
@@HarryPotter-wm3kf YES it is. A specialized Tarmac SL6 Sport Disc my2020 in European colourway. Features a normal round clamp. I think the dude knows which bike he has 😅
When someone looks for a highly specialized job but only in a small localized area, and then complains they can't find a job, they have no sympathy. The advice given here is spot on. As a new grad, you may very well need to relocate.
I am thankful your channel came up in my recommended videos ages ago, they are brilliant. Your a mountain of knowledge its great all this help you give out to viewers. Keep the videos coming and thanks as a non engineer a many of your videos really make sense of potential problems 👍
Love it when you reinforce the idea that the simplest designs are usually the best. So happy with my bike that now has BSA and 27.2mm round seat post and rim brakes!
As a 67kg MTB rider I love straight pull spokes as I believe the spoke/hub interface allows a nice progressive lateral flex that reduces line deflection a little and can’t be replicated by running lower tension on J-bends (they just feel dead).
After going through all the most modern bikes and groups I've returned to manual Campy 11 speed titanium bike. If I wanted to spend more money I would buy a steel race custom from any number of builders. Screw bikes that "wear out".
UK engineering questions: You can also have a look on the catapult centres around the UK. AMRC, NCC, WMG, etc... I would also consider moving out of London for more technical jobs. I am based in Bristol and there are quite a few technical job roles, both in big organisations (RR, Airbus, GKN) or smaller startups, which they have really taken off here. Good luck with all your future endeavours.
@@calumramsay9641 It depends on what you want to ultimately do. An apprenticeship will be more hands on, but to be a CEng, a degree is probably the quickest route. I think a Masters is now required, fortunately not in my day. I did a degree and went on a Graduate scheme that incorporated a pathway to Chartered status.
@ you can't have your cake an eat it to.. you either have the way of thinking and "waste your time to aquire the knowledge" therefore having no other choice than to make it your job.. or you don;t :)..
There was an oversupply if engineers a while back in Australia so many graduates tried their luck overseas. My friend moved into project management in civil and another from electrical design into electrical fitting making more money installing PV systems. Such a diverse profession though from university to commercial product testing.
Physio here... Actual jumper's knee or pathellar tendinopathy is caused by high energy storage and release exercises like jumping or sport with acelleration and decelleration. Cycling has only a concentric phase, the eccentric is neglectable. It's more likely to be a patello-femoral syndrome
Physio2 here. :) Alex actually used as an example Quadriceps tendinitis. Either way, repetitive strain injuries in cyclists are common typically for the reason Alex mentioned......unreasonable rate of increase in pedaling volume/intensity. My tips to reduce injury when new to cycling, or increasing volume rapidly (say for a multi day endurance ride) 1. As Alex has heard me say before, everything starts with tissue composition and operating environment, which is determined by hydration, nutrition, and sleep quality. If you want to ask big things of your body, fuel it smartly, or die an early and miserable death. The majority of chronic knee pain issues pro cyclists I've seen have are due mostly to poor diet and injuries from non cycling sport. 2. Some tendinopathies are due to poor patellofemoral tracking.....These can further be categorized as structural, or pain avoidance. The solution includes a set up to minimize structural issues i.e. valgus knee joint, FAI, pronating mid foot. 3. muscle function and pathology should be taken seriously with quads and patella tendinopathies. The biggest problem I see in serious amateur cyclists is underuse of the hamstrings due to too high a saddle. Often the hams are prone to cramping due to hypoperfused sections of muscle from old strains. The hams need to be massaged heavily to facilitate better blood flow through old scar tissue, and an appropriate concentric and eccentric exercise program be started. The second knee pain issue arises from overly tight vastus lateralis, and underactive VM (VMO). VL pulls the patella laterally and stirs the outer edge of the PF joint. VL often scars up and gets excessively tight through out teens and 20s. Dry needling trigger poitns and heavy massage are brilliant for it. If VM is underactive, then one must suspect internal damage to the knee jt (meniscus or cruciate lig). 4. Adolescent riders can develop PFPS, OCD, OSD due to growth spurt. Once again, this is less likely if a rider is eating and sleeping well, has a good bike setup, and doesn't suddenly increase volume. As for shorter cranks, I am all for this. And for smaller knee angle (straighter leg), this will vary depending on knee pathology and stage. Some older riders with worn knees may never be able to tolerate more knee flexion due to osteoarthritis or meniscus damage. However, no matter one's age, the goal should always be to distribute cycling work between quads, hams, glutes, and calf. By doing so, one will not burn out the quads and glutes as early. And will avoid issues with overuse of quads. To unload quads and get hams to do a greater share of the pedaling work, the maximum knee bend angle needs to be around 35degreess, even higher. Anyway, 35 is a good goal if under that currently. For many newer riders, 35 will feel like the saddle is too low......but people will adapt. ok, rant off
@@helicart I think you misunderstand the difference between correlation and causation. Still talking about VMO not active, strains and scarring, patella maltracking. Oh c'mon man... We have come a long way since the good ol' times. Ps: you talk about the saddle too high cause ham to cramp and then you mention that the knee should be flexed at ≥35°. Welp. Everyone have their own anatomy, don't generalize 😅
@@LucaBonato PT and biomechanics PhD candidate here. Thank you Luca! Can't believe the amount we still have to hear about patellar tracking, VMOs, and "inactive glutes" from patients. The profession has move beyond these things and it's on physios/PTs that are too routed in the past that perpetuate these simplistic ideas.
All DA and Ultegra hydro STI levers are Servo-Wave actually. First gen 105 (RS505) has that spec too. The servo-wave mechanism is visible externally on the RS505.
You really should get paid by Giant, I'm not currently in the market for a high-end road bike, but hearing a fellow mechy, who has done his research, rave about them will definitely be in my mind if I do ever go down that route. Although it's also great to know your opinion of them is not informed by a pay cheque.
If possible can you take a look at the SRAM UDH derailleur hanger. The area that seems like a bit of BS regarding it is it allegedly allows rotation when the derailleur is impacted. I think they’ll be far to much friction involved to allow that but You’ll likely be able to quantify it. Oh and IME you’ll reduce the derailleur return spring tension if you leave it in a gear like that ;-)
Brilliant blog. I had a BMC Road Machine. I bought it to go faster and put a smile on my face. I was in love with that bike until a local powder fuelled scumbag decided it would fund his next horizontal recreation and sledge hammered in my garage door and personalised it. It was a tough decision regarding my next bike. Lots of research which included content from you and David Arthur saw me with the Giant TCR Advanced Pro 1. Bugger me what a bike. Everything I ever wanted and more. You and David should really pressurise the boys in Taichung for an affiliate deal. Without you, I’d be riding another BMC today.
With Engineering - suggest look into Rail. Lots of potentail for good work and growth for Electrical/Mechanical/Civil (I'm in Electrical/Signalling in AUS).
Not sure about the 240(s), haven't taken those apart, but I have the XM1501 (gen2) wheelset and recently had to do a bearing swap - it has an idiocy of a 6802 bearing on NDS and a 1526 bearing on DS... Anywho, the axle slides through the bearings fairly easily, you can mount them by hand. It's a pressfit into the hub shell of course, but yeah, not exactly tight on the axle.
From my experience working in a shop, 1. The vast majority of wheels had j-bend spokes and only occasional high end wheels had straight pull. While cheap poorly built wheels might snap at the j-bend, the number really wasn't significant. Most spoke failure was impact related and any fatigue failures were more often than not, at the base of the thread.
I'm a bike mechanic and most spokes break at the J-bend. This is caused by the spoke tension being too low, the spokes then fail by fatigue because they are periodically unloaded. Spokes breaking in the middle are very rare, I'm surprised, that your experience is opposite.
Great channel and appreciate your knowledge! My pet-peeve (one of them any way) in cycling is misdiagnosed knee pain. Knee pains are most often caused by poor positioning and a close second, weak lower back and core muscle strength and/or imbalance. You’d surprised how much knee pains are related to hip issues and even ankle problems ie. cleat position. Do some research and you’ll find a lot of overlooked info. Over use issues can also illustrate poor positioning and muscular imbalances....being a former racer with some time completely away then coming back a few times, I can speak from experience the hard way.
Of the four quadricep muscles, the most superficial muscle is the rectus femoris. Unlike the 3 Vastus (medialis, intermedius, lateralis) muscles are one joint muscles. ie. They cross only the knee because they start at the trochanters on the femur. The rectus femoris starts at the pelvis and crosses both the hip and the knee (2 joint muscle). This muscle length shortens with sitting and lengthens with standing. Old fat guys with a sitting job (like me) have tension on the knee from the tight rectus femoris unless they work on breaking up the fibrotic changes in the actin/myosin portions of the muscle belly and stretching the muscle out in a position of hip extension. ie. Lunge position with a bent knee heel to butt. The easiest way to break up the knots (fibrotic changes) in the muscle is to lay prone supported by bent elbows with a 150cm hard foam roll. Start above the knee cap and bend the involved knee up and down (90 degrees) about 5-6x. Slide your body down to move the foam roll away from the from the knee cap (patella) about 3cm (1 inch). If you are "manly" slide the foam roller off center so that only the sore knee is supported by the foam roll and lift up the "good leg" to add more force to deep tissue massage on your tight rectus femoris. The tenderness at the patellar tendon is often lessened after each session.
@@soaringvulture wow. Yesterday i was going to put a message out calling for a metallurgist's help on a personal project. In particular martensitic stainless steels. If you're ok to help could you drop me an email? Address in video description. Cheers!
3:40 - Straight pull spokes for the win, *EVERY* time if you are into touring, bikepacking, or adventure riding. Reason being it is MUCH easier to replace a broken spoke in the field, especially on rear wheels, should that need arise. I can replace straight pull spokes on my bike without even removing the wheel from the bike (no need to remove disc rotor or rear cassette either). I actually created a video about this a while back. If you are not into touring, bikepacking, or any kind of riding that takes you far off the beaten path and away from civilization then it probably doesn't matter either way. But otherwise, definitely straight pull spokes. Every time.
Have you looked at Paul Components Klamper mechanical disc calipers? I use them on my road bike to explosive joy. They have independently adjustable pads and the only issue is the cable entry is way outboard so routing through a modern fork and frame requires flexible brake noodles. They're great.
I had em on my surly and loved but did recently get to try nice hydraulic setup and it is a world of a difference especially in an off road environment
JLR (and their suppliers) are one of the biggest engineer employers in the UK midlands. That area is very depressed at the moment due to corona and business reconstructions but in one or 2 years should be full of opportunities for young graduates. Job market in the UK is very bad at the moment even for experienced engineers.
Hi mate, love your videos. What are your thoughts about the bikes made by Bastion? Are they worth the money from an engineering perspective? They use 3d printed titanium lugs and carbon tubes. Cheers
Nice series. I do have a question. Which frame material would you recommend excluding carbon? I am not racer, more endurance cyclist. I want to buy robust frame which not fail in middle of nowhere. Do you think that small UK companies like Mason or Fairlight is good way to go or should I choose something from big brands? Thanks in advance for answer.
ive seen them snapped at the j bend a few times. this is mostly due to them being ran too loose for a period of time and allowing the spoke to move around until the head snaps off
Knee pain - front of the knee: raise saddle; pain in back of knee/hamstrings/achillies: lower saddle. Frames: I've owned and raced over 20 and the Giant TCR (and SL) is almost unbeatable. I've relentlessly back-to-back tested the S-Works Tarmac against the TCR SL and the TCR is lighter, quieter, faster accelerating, more compliant with a better BB standard and carbon finish. The Tarmac has better paint, better front end torsional rigidity when cornering and faster steering. Now I get no sponsorship, I'd choose the Giant every time. This applies to the Revolt and Defy too, though not the Propel which is still a bit beta. It is now very hard to find a better bike than Giant, unless you want an outright pure aero road race bike I'd go Ridley or 3T) or you want steel/Ti, or Italian soul and handling (Colnago C-series, obv)!
'dont buy direct to consumer' is probably the best advice. I made a mistake of buying a bike directly and I've had to repair everything myself. I guess necessity is the mother of all inventions, but for your first bike, get Giant.
Love these Q&A videos! I've always had Giant near the top of my list of "next new bike to buy" but the controversy over press fit bottom brackets and creaking due to bad QC makes me think I should consider one of the manufacturers that have moved back to threaded bottom hatchets. I don't see Giant abandoning their commitment to press fit bottom brackets so I'd love to hear your opinion on the quality of Giant's press fit bottom bracket manufacturing.
@@hippoace Hi hippoace! I'm a big fan of Hambini's engineering and have watched a lot of videos he has put out on press-fit bottom brackets. What I have learned from him is that IF the manufacturing of the press-fit bottom bracket is done to a high level of quality, the press-fit system works well. But that is the problem. So many manufacturers release poorly made press-fit bottom brackets with out-of-round, misaligned, etc. press-fit systems. And that is what I want to avoid. I also know Hambini is still a fan of the press-fit system WHEN IT IS EXECUTED WELL BY THE MANUFACTURER and that he considers threaded bottom brackets as really a press-fit system as the bearings are still press-fit into the threaded bottom bracket. My opinion is that the threaded bottom bracket increases the ability of manufacturers to produce a product that is better aligned and more round. Hamblin is right. You still have to "press-fit" the bearings into the threaded bottom brackets. But the chances that you are putting those bearings into a bottom bracket with acceptable geometry is higher with a threaded bottom bracket. Does that make sense?
If people insist on city living, we will need electricity, plumbing, and HVAC from now until eternity. Not as sexy as Aero/Auto, but you will have a job.
Excellent channel. Stumbled across it a week ago and have watched a lot of your videos, as well as Hambinis. you've opened my eyes to a lot of the poor reliability products being churned out by the big bike brands. Im actually in the market for a new carbon road bike. Was looking at the new Cannondale supersix to replace my old one. But having second thoughts after watching your review. It seems like you and hambini have identified poor engineering in almost all bike brands out there. So, which bike/brand would you recommend most? I'd love to see an updated review of the top bikes out there in 2021 based on value + engineering. Would you still recommend the giant TCR even after the issues you had recently? I'm based in the UK btw. Pricing has gone mad. Cheers
If you are a masters mechanical engineer San Diego is a good place to start. California sucks big time and it is very expensive to live but the work is bleeding edge. It would be nice to have people that can speak English around.
On the topic of road bike disc brakes, I have a mate who has a disc brake bike, but he runs Dura-Ace 9100, the rim brake version, and uses a brake caliper from TRP that is cable operated. Unlike most cable disc calipers, this one from TRP has the pads close in from both directions, so it works just like a hydraulic caliper. He has no issues with the pistons not retracting and disc rub, even sprinting. I was wondering in terms of the engineering side of things, how will having a hydraulic system and cable system compare in terms of braking force? Keep up with the great content on your channel!
I had an alignment issue with my 2016 cube attain gtc sl disc. Disc squealing. Even on brand new rotors. Dt Swiss wheel bearings being eaten up. Headsets bb also. After 4 months and me contacting cube direct. Info'd frame totally out of alignment and full refund. Took a while to get this. Didn't help cube German based but frames done through somewhere in the Netherlands I believe. So cube and frame people took ages to speak to each other.
Re engineering careers, plenty of aerospace companies in NW England, eg BaE at Warton & Samlesbury, though threats to numbers with cutbacks have often been a problem
I only snapped spokes when BMXing and it always snapped either where the spokes crossed or at the head where the threads start. 99% of the time it was the latter. J-bend 4 lyf
Hi man. I'm on the market for 60mm aero rim brake wheels. Rear brake of my bike is on chainstay and lateral stiffness is very important for my wheels. I know that Winspace Hyper are very stiff. Can you recommend me other brand/model that are with same stiffness or higher, please? Thanks
I am in search of boost hubs for my 29+ bike for traveling and I ended up with XC or Enduro hubs. I have found very little info and your comment on their differences would be very viable!
@@conman1395 well, the spoke count is 32 for both types, engagement point may or may not be different. The weight is the only clear point for differentiating by this point.
mm stands for millimetre you're probably not familiar. its a unit of measurement, 10 of them in a cm or centimetre, 100 cm in 1 metre. pretty easy to understand right?
The frame is not a specialized SL6 it may be a SL5. SL6 doesn’t clamp the frame onto the seatpost it is also not round and has a hidden Allen bolt type that clamps onto the post
@@PeakTorque thanks for answering the hub-question. Sure there are many aspects to it - but what about *stiffness to weight* on that j-bend/SP comparison? …Hub- or wheel-related asking. The maintenance aspect clearly goes to j-bend for sure - so I guess it’s better for MTB… Going straight pull all the way on road 🚴🏻♂️
Me too. While I think straight-pull is more marketing than anything, I've seen plenty of high-quality stainless spokes broken at the bend..but I AM an old-fart :-)
Thank you for the very nice and informative videos. Btw, Porsche 911 are not perfect cars and way too needy when it comes to complex engineering/mechanics. Marketing and nice design covers the mechanical faults....
Nothing is perfect. But once you start looking at how Porsches are made, all of them, not just 911s, it's freaking insane. The way they handle the details is just amazing.
London is alright if you've got 10+ yrs experience and you're chartered, for eg oil and gas project engineer I know who's on 60k/yr with an MEng and CEng
That doesn't sound much of a sallary for a job with travel on demand, two master degrees and a decade of experience. On top of high living expences in London
J bend spokes absolutely have snapped at the bend. typically an error of poor limit screws and damage from chain though. also likely found from fatigue on a steel rimmed wheel from the 70s with crappy spokes to begin with, ie: not stainless. Also i posted a comment on the qr vs ta analysis video, but heres the question: does the diameter of the mating surface matter when a torsional load matter? Since the mating surface of a QR is only as big as the hub endcap, and the diameter of the endcap of a thru-axle is (slightly) larger, which allows for slightly more side-loads to be applied, assuming no slippage in either case. I am certainly making an assumption that stiffness is being equated to the ability to track in a corner or the resistance to deflect under side loads. Furthermore, would the cammed action (where peak force applied is when the QR is in the process of being closed) allow for some ability for the fork legs to open back up more than something being screwed in, making a TA feel stiffer?
Update: RICHARD FROM SLOVAKIA HAS HAD HIS TARMAC FRAME WITH THE ST CRACK REPLACED UNDER WARRANTY BY SPECIALIZED! 🍻🍻👍 Finally some good news from the industry!
Its not a SL6 !
Nice
@@HarryPotter-wm3kf what is it then
@@HarryPotter-wm3kf YES it is. A specialized Tarmac SL6 Sport Disc my2020 in European colourway. Features a normal round clamp. I think the dude knows which bike he has 😅
@@PeakTorque LOL
I see that your modeling career is taking off 😄
He must be doing it for a bet.
Hair's turned grey, YouTubing is a tough business
Love your analysis regarding bikes and cycling. Not afraid to speak your mind, like some other channels. Please continue to keep us informed.👍
When someone looks for a highly specialized job but only in a small localized area, and then complains they can't find a job, they have no sympathy. The advice given here is spot on. As a new grad, you may very well need to relocate.
I'm glad to see Milo Yiannopoulos has found something new to do.
lol
The Milo conversion is complete
Lol 😂
Lol I forgot that guy exists
😂
I am thankful your channel came up in my recommended videos ages ago, they are brilliant. Your a mountain of knowledge its great all this help you give out to viewers. Keep the videos coming and thanks as a non engineer a many of your videos really make sense of potential problems 👍
@@simost2566 sorry, let me refund your membership fees...
Love it when you reinforce the idea that the simplest designs are usually the best.
So happy with my bike that now has BSA and 27.2mm round seat post and rim brakes!
Just found this channel and I love it. Awesome video. I’m learning a lot
Great Q&A. Makes me wish I had followed an engineering career. Thanks for all of your great videos. Reminds me of so much I love about cycling.
You man, is what cyclist need on youtube. Clear, funny and helpfull information. Thanks alot
I have learned from this video something that will solve my problem regarding bolts coming loose. Thanks for sharing
It’s great getting your insight, thanks
Great channel. Always interesting to watch.
As a 67kg MTB rider I love straight pull spokes as I believe the spoke/hub interface allows a nice progressive lateral flex that reduces line deflection a little and can’t be replicated by running lower tension on J-bends (they just feel dead).
How refreshing hear “Simplicity “ in the cycling world! Well said mate!
After going through all the most modern bikes and groups I've returned to manual Campy 11 speed titanium bike. If I wanted to spend more money I would buy a steel race custom from any number of builders. Screw bikes that "wear out".
@@tomkunich9401
Amen on that!
My one is a Bob Jackson 1969
I love it ! Is not my racing one , but I love it.
thanks for all the great questions and answers, as well as answering mine :)
You are a well educated man! Big thumbs up for you
UK engineering questions: You can also have a look on the catapult centres around the UK. AMRC, NCC, WMG, etc... I would also consider moving out of London for more technical jobs. I am based in Bristol and there are quite a few technical job roles, both in big organisations (RR, Airbus, GKN) or smaller startups, which they have really taken off here. Good luck with all your future endeavours.
As a 30 year UK Chartered Engineer and passionate cycling, really enjoying the videos From a CEng MIET
I'm about to leave school and have applied to mechanical engineering at uni but have also applied to some apprenticeships. whats better?
@@calumramsay9641 It depends on what you want to ultimately do. An apprenticeship will be more hands on, but to be a CEng, a degree is probably the quickest route. I think a Masters is now required, fortunately not in my day. I did a degree and went on a Graduate scheme that incorporated a pathway to Chartered status.
@@davidmartin305 Thanks for the reply, I will definitely have to weigh up the options and come to a decision soon.
Man... i left engineering several years ago, i just started to hate everything around it. You make me interested in it again.
you should keep staying away from it;)
@@georgestate9384 i will. Don't want it as a job. But the way of thinking and the knowledge, the problem solving are great to have
@ you can't have your cake an eat it to.. you either have the way of thinking and "waste your time to aquire the knowledge" therefore having no other choice than to make it your job.. or you don;t :)..
I fucking love this channel, solid work
My Campagnolo Athena chainring bolts also came loose! To the point that one out of 5 was missing lol
There was an oversupply if engineers a while back in Australia so many graduates tried their luck overseas. My friend moved into project management in civil and another from electrical design into electrical fitting making more money installing PV systems. Such a diverse profession though from university to commercial product testing.
Physio here... Actual jumper's knee or pathellar tendinopathy is caused by high energy storage and release exercises like jumping or sport with acelleration and decelleration. Cycling has only a concentric phase, the eccentric is neglectable. It's more likely to be a patello-femoral syndrome
I knew you'd comment :) cheers.
@@PeakTorque ahah, if you have any doubt dm me on Instagram (i'm already a follower there, same name)
Physio2 here. :) Alex actually used as an example Quadriceps tendinitis.
Either way, repetitive strain injuries in cyclists are common typically for the reason Alex mentioned......unreasonable rate of increase in pedaling volume/intensity.
My tips to reduce injury when new to cycling, or increasing volume rapidly (say for a multi day endurance ride)
1. As Alex has heard me say before, everything starts with tissue composition and operating environment, which is determined by hydration, nutrition, and sleep quality. If you want to ask big things of your body, fuel it smartly, or die an early and miserable death. The majority of chronic knee pain issues pro cyclists I've seen have are due mostly to poor diet and injuries from non cycling sport.
2. Some tendinopathies are due to poor patellofemoral tracking.....These can further be categorized as structural, or pain avoidance. The solution includes a set up to minimize structural issues i.e. valgus knee joint, FAI, pronating mid foot.
3. muscle function and pathology should be taken seriously with quads and patella tendinopathies. The biggest problem I see in serious amateur cyclists is underuse of the hamstrings due to too high a saddle. Often the hams are prone to cramping due to hypoperfused sections of muscle from old strains. The hams need to be massaged heavily to facilitate better blood flow through old scar tissue, and an appropriate concentric and eccentric exercise program be started.
The second knee pain issue arises from overly tight vastus lateralis, and underactive VM (VMO). VL pulls the patella laterally and stirs the outer edge of the PF joint. VL often scars up and gets excessively tight through out teens and 20s. Dry needling trigger poitns and heavy massage are brilliant for it. If VM is underactive, then one must suspect internal damage to the knee jt (meniscus or cruciate lig).
4. Adolescent riders can develop PFPS, OCD, OSD due to growth spurt. Once again, this is less likely if a rider is eating and sleeping well, has a good bike setup, and doesn't suddenly increase volume.
As for shorter cranks, I am all for this.
And for smaller knee angle (straighter leg), this will vary depending on knee pathology and stage. Some older riders with worn knees may never be able to tolerate more knee flexion due to osteoarthritis or meniscus damage.
However, no matter one's age, the goal should always be to distribute cycling work between quads, hams, glutes, and calf. By doing so, one will not burn out the quads and glutes as early. And will avoid issues with overuse of quads.
To unload quads and get hams to do a greater share of the pedaling work, the maximum knee bend angle needs to be around 35degreess, even higher. Anyway, 35 is a good goal if under that currently. For many newer riders, 35 will feel like the saddle is too low......but people will adapt.
ok, rant off
@@helicart I think you misunderstand the difference between correlation and causation. Still talking about VMO not active, strains and scarring, patella maltracking. Oh c'mon man... We have come a long way since the good ol' times. Ps: you talk about the saddle too high cause ham to cramp and then you mention that the knee should be flexed at ≥35°. Welp. Everyone have their own anatomy, don't generalize 😅
@@LucaBonato PT and biomechanics PhD candidate here. Thank you Luca! Can't believe the amount we still have to hear about patellar tracking, VMOs, and "inactive glutes" from patients. The profession has move beyond these things and it's on physios/PTs that are too routed in the past that perpetuate these simplistic ideas.
I took your advice 0:56 seconds in, cheers from oz!
All DA and Ultegra hydro STI levers are Servo-Wave actually. First gen 105 (RS505) has that spec too. The servo-wave mechanism is visible externally on the RS505.
Interesting i didn't know that! Doesn't seem to work that well as mtb.
I've got a Rs505 set from Shimano and I confirm, they do have servo-wave. I enen paired the front one with a SLX caliper and it works beautifully.
You really should get paid by Giant, I'm not currently in the market for a high-end road bike, but hearing a fellow mechy, who has done his research, rave about them will definitely be in my mind if I do ever go down that route.
Although it's also great to know your opinion of them is not informed by a pay cheque.
If possible can you take a look at the SRAM UDH derailleur hanger. The area that seems like a bit of BS regarding it is it allegedly allows rotation when the derailleur is impacted. I think they’ll be far to much friction involved to allow that but You’ll likely be able to quantify it. Oh and IME you’ll reduce the derailleur return spring tension if you leave it in a gear like that ;-)
Brilliant blog. I had a BMC Road Machine. I bought it to go faster and put a smile on my face. I was in love with that bike until a local powder fuelled scumbag decided it would fund his next horizontal recreation and sledge hammered in my garage door and personalised it. It was a tough decision regarding my next bike. Lots of research which included content from you and David Arthur saw me with the Giant TCR Advanced Pro 1. Bugger me what a bike. Everything I ever wanted and more. You and David should really pressurise the boys in Taichung for an affiliate deal. Without you, I’d be riding another BMC today.
With Engineering - suggest look into Rail. Lots of potentail for good work and growth for Electrical/Mechanical/Civil (I'm in Electrical/Signalling in AUS).
Great video.
Concerning the discbrakes and servo wave, the grx 800 stis do have servo wave integrated.
Not sure about the 240(s), haven't taken those apart, but I have the XM1501 (gen2) wheelset and recently had to do a bearing swap - it has an idiocy of a 6802 bearing on NDS and a 1526 bearing on DS...
Anywho, the axle slides through the bearings fairly easily, you can mount them by hand. It's a pressfit into the hub shell of course, but yeah, not exactly tight on the axle.
Work at a shop & you'll see snaps at the J frequently. That being said I still agree with everything you said 🍻
Because of badly adjusted limit screws and the chain has eaten the j bend? That doesn't count 😉
Spokes broke only at j bend. Derailleur correctly adjusted. What about hubs that do not have chamfered spoke holes?
From my experience working in a shop, 1. The vast majority of wheels had j-bend spokes and only occasional high end wheels had straight pull. While cheap poorly built wheels might snap at the j-bend, the number really wasn't significant. Most spoke failure was impact related and any fatigue failures were more often than not, at the base of the thread.
The Shimano Gravel GRX levers have servo wave. A bit bigger than the road levers but I find much more comfortable and a better grip.
I'm a bike mechanic and most spokes break at the J-bend. This is caused by the spoke tension being too low, the spokes then fail by fatigue because they are periodically unloaded. Spokes breaking in the middle are very rare, I'm surprised, that your experience is opposite.
Great channel and appreciate your knowledge!
My pet-peeve (one of them any way) in cycling is misdiagnosed knee pain. Knee pains are most often caused by poor positioning and a close second, weak lower back and core muscle strength and/or imbalance. You’d surprised how much knee pains are related to hip issues and even ankle problems ie. cleat position. Do some research and you’ll find a lot of overlooked info. Over use issues can also illustrate poor positioning and muscular imbalances....being a former racer with some time completely away then coming back a few times, I can speak from experience the hard way.
Of the four quadricep muscles, the most superficial muscle is the rectus femoris. Unlike the 3 Vastus (medialis, intermedius, lateralis) muscles are one joint muscles. ie. They cross only the knee because they start at the trochanters on the femur. The rectus femoris starts at the pelvis and crosses both the hip and the knee (2 joint muscle). This muscle length shortens with sitting and lengthens with standing. Old fat guys with a sitting job (like me) have tension on the knee from the tight rectus femoris unless they work on breaking up the fibrotic changes in the actin/myosin portions of the muscle belly and stretching the muscle out in a position of hip extension. ie. Lunge position with a bent knee heel to butt. The easiest way to break up the knots (fibrotic changes) in the muscle is to lay prone supported by bent elbows with a 150cm hard foam roll. Start above the knee cap and bend the involved knee up and down (90 degrees) about 5-6x. Slide your body down to move the foam roll away from the from the knee cap (patella) about 3cm (1 inch). If you are "manly" slide the foam roller off center so that only the sore knee is supported by the foam roll and lift up the "good leg" to add more force to deep tissue massage on your tight rectus femoris. The tenderness at the patellar tendon is often lessened after each session.
I've never heard "chrome-moll-eye" over here in the Unified Stations, only "chrome-moll-ee."
love your channel, btw!
I've heard it pronounced CRO-molly here in the USA
@@5speed735i I'm an American metallurgist. I've only heard "chrome-moll-ee".
Haha ok i was half right. Next time.
@@soaringvulture wow. Yesterday i was going to put a message out calling for a metallurgist's help on a personal project. In particular martensitic stainless steels. If you're ok to help could you drop me an email? Address in video description. Cheers!
3:40 - Straight pull spokes for the win, *EVERY* time if you are into touring, bikepacking, or adventure riding. Reason being it is MUCH easier to replace a broken spoke in the field, especially on rear wheels, should that need arise. I can replace straight pull spokes on my bike without even removing the wheel from the bike (no need to remove disc rotor or rear cassette either). I actually created a video about this a while back. If you are not into touring, bikepacking, or any kind of riding that takes you far off the beaten path and away from civilization then it probably doesn't matter either way. But otherwise, definitely straight pull spokes. Every time.
Which hubs?
@@mtbboy1993 Shimano XTR (straight pull)
Sound spromising.
Have you looked at Paul Components Klamper mechanical disc calipers? I use them on my road bike to explosive joy. They have independently adjustable pads and the only issue is the cable entry is way outboard so routing through a modern fork and frame requires flexible brake noodles. They're great.
I had em on my surly and loved but did recently get to try nice hydraulic setup and it is a world of a difference especially in an off road environment
🎵 "YOU ARE....MY FIIIREEEE, THE ONE... DESSSIIIIREEEEE..."
I'd probably recommend squirt lubes if want it "that" way.
JLR (and their suppliers) are one of the biggest engineer employers in the UK midlands. That area is very depressed at the moment due to corona and business reconstructions but in one or 2 years should be full of opportunities for young graduates. Job market in the UK is very bad at the moment even for experienced engineers.
Hi mate, love your videos. What are your thoughts about the bikes made by Bastion? Are they worth the money from an engineering perspective? They use 3d printed titanium lugs and carbon tubes. Cheers
Nice series.
I do have a question.
Which frame material would you recommend excluding carbon? I am not racer, more endurance cyclist.
I want to buy robust frame which not fail in middle of nowhere.
Do you think that small UK companies like Mason or Fairlight is good way to go or should I choose something from big brands?
Thanks in advance for answer.
ive seen them snapped at the j bend a few times. this is mostly due to them being ran too loose for a period of time and allowing the spoke to move around until the head snaps off
Knee pain - front of the knee: raise saddle; pain in back of knee/hamstrings/achillies: lower saddle. Frames: I've owned and raced over 20 and the Giant TCR (and SL) is almost unbeatable. I've relentlessly back-to-back tested the S-Works Tarmac against the TCR SL and the TCR is lighter, quieter, faster accelerating, more compliant with a better BB standard and carbon finish. The Tarmac has better paint, better front end torsional rigidity when cornering and faster steering. Now I get no sponsorship, I'd choose the Giant every time. This applies to the Revolt and Defy too, though not the Propel which is still a bit beta. It is now very hard to find a better bike than Giant, unless you want an outright pure aero road race bike I'd go Ridley or 3T) or you want steel/Ti, or Italian soul and handling (Colnago C-series, obv)!
Biggie bigs on your bike has my OCD working overtime 🤣
And the drive-side facing the wall :D
Yeah that's just a nice from me
Initially confused by your reference to Notorious B.I.G.
'dont buy direct to consumer' is probably the best advice. I made a mistake of buying a bike directly and I've had to repair everything myself. I guess necessity is the mother of all inventions, but for your first bike, get Giant.
Love these Q&A videos! I've always had Giant near the top of my list of "next new bike to buy" but the controversy over press fit bottom brackets and creaking due to bad QC makes me think I should consider one of the manufacturers that have moved back to threaded bottom hatchets. I don't see Giant abandoning their commitment to press fit bottom brackets so I'd love to hear your opinion on the quality of Giant's press fit bottom bracket manufacturing.
you should watch hambini pressfit vs threaded bb video
@@hippoace Hi hippoace! I'm a big fan of Hambini's engineering and have watched a lot of videos he has put out on press-fit bottom brackets. What I have learned from him is that IF the manufacturing of the press-fit bottom bracket is done to a high level of quality, the press-fit system works well. But that is the problem. So many manufacturers release poorly made press-fit bottom brackets with out-of-round, misaligned, etc. press-fit systems. And that is what I want to avoid. I also know Hambini is still a fan of the press-fit system WHEN IT IS EXECUTED WELL BY THE MANUFACTURER and that he considers threaded bottom brackets as really a press-fit system as the bearings are still press-fit into the threaded bottom bracket. My opinion is that the threaded bottom bracket increases the ability of manufacturers to produce a product that is better aligned and more round. Hamblin is right. You still have to "press-fit" the bearings into the threaded bottom brackets. But the chances that you are putting those bearings into a bottom bracket with acceptable geometry is higher with a threaded bottom bracket. Does that make sense?
@@MrLuigi-oi7gm well if you have watched his videos, you should know which brands he says do a good job of pressfit bb
@@hippoace Ahhhhhh, if I could afford a LOOK or TIME bike I would get one!
@@MrLuigi-oi7gm Then buy Giant. I have a TCR for 3 yrs now...no bb creaks
I get my masters in June too... WE ARE FOOKED
No. If its MEng its probably one of the best degrees to have in the quiver. Finance also dig it.
If people insist on city living, we will need electricity, plumbing, and HVAC from now until eternity. Not as sexy as Aero/Auto, but you will have a job.
I'm in architecture... I am foooked
@@decoduck hvac systems are pretty sexy thh
To my knowledge the grx di2 sti's have a servowave mechanism in them
Excellent channel. Stumbled across it a week ago and have watched a lot of your videos, as well as Hambinis. you've opened my eyes to a lot of the poor reliability products being churned out by the big bike brands. Im actually in the market for a new carbon road bike. Was looking at the new Cannondale supersix to replace my old one. But having second thoughts after watching your review. It seems like you and hambini have identified poor engineering in almost all bike brands out there. So, which bike/brand would you recommend most? I'd love to see an updated review of the top bikes out there in 2021 based on value + engineering. Would you still recommend the giant TCR even after the issues you had recently? I'm based in the UK btw. Pricing has gone mad. Cheers
Can you discuss the new syncros one piece wheels?
As someone who has broken at least 35 spokes in the 35 years I've been riding, 95% of them break at the j-bend in the spokes. Straight pull FTW.
Try 4 cross high flange with 15 gage straight butted spokes and it will break at the 1st thread at the nipple. Try finding 15 gage spokes!
Actually road di2(r80xx/91xx and grx series) levers do have servo wave
Hi mate,
Can I ask you about your hyperwheels if you have also issue about the creaking noise/ spoke rubbing each other?
Thanks 👍
He's gone Bianchi Blonde, cause he knows Hambini can't respond, and it's a +1 in the top trumps shootout.
Why can’t Hambini respond?
@@thedownunderverse Can you imagine Hambini going blonde?
No way he'd give up his beautiful brunette pornstar barnette
Shimano 105 (R7000) disc has sirvo wave, can't say it feels any different than any other road disc groupset lol
If you are a masters mechanical engineer San Diego is a good place to start. California sucks big time and it is very expensive to live but the work is bleeding edge. It would be nice to have people that can speak English around.
Daddy peak GoT new dye
Porsche - Poor example - RMS seal/bore scoring/ims! Otherwise...really good video
Hey! "we" say chrome MOLLY... like Molly Ringwald... Sorry, I don't know any English Molly's. Always good stuff!!!
Why do you have your chain on the biggest cogs? Isnt that putting stress on the cable and stretching it out?
On the topic of road bike disc brakes, I have a mate who has a disc brake bike, but he runs Dura-Ace 9100, the rim brake version, and uses a brake caliper from TRP that is cable operated. Unlike most cable disc calipers, this one from TRP has the pads close in from both directions, so it works just like a hydraulic caliper. He has no issues with the pistons not retracting and disc rub, even sprinting. I was wondering in terms of the engineering side of things, how will having a hydraulic system and cable system compare in terms of braking force? Keep up with the great content on your channel!
TRP Spyre SLC are considered the best non-hydraulic disc brakes.
How much do you charge for the 15° spacers? Cheers
GRX Di2 has servowave.
Tarmac SL6 has a D shaped seat post and and internal seat clamp.
It's the cheaper SL6 model with standard seatpost (not D shaped)
What do you think of cannondale caad optimo
can you please make a video comparing the aluminum bikes in the market?
Yes!!!
Which Uni did you go to Peak Torque? I did MEng at UCL.
Nice barnet
your rim TCR or your disc tcr ? which is better overall ?
I had an alignment issue with my 2016 cube attain gtc sl disc. Disc squealing. Even on brand new rotors. Dt Swiss wheel bearings being eaten up. Headsets bb also. After 4 months and me contacting cube direct. Info'd frame totally out of alignment and full refund. Took a while to get this. Didn't help cube German based but frames done through somewhere in the Netherlands I believe. So cube and frame people took ages to speak to each other.
This accent 😍
Recommend shochu instead of Corona
Colin Chapman: Simplify and add lightness
Re engineering careers, plenty of aerospace companies in NW England, eg BaE at Warton & Samlesbury, though threats to numbers with cutbacks have often been a problem
I was at Barrow for a bit.
@@PeakTorque Ah yes, Barrow, the worlds longest cul-de-sac. ;-)
Spring washers stop fasteners coming loose under vibration ...I don't think so
I belive that Di2 GRX levers do have servo-wave
Correct.
I believe both the Di2 and the mechanical GRX feature Servowave. The Di2 has the added benefit of an extra 18mm on the pivot location.
Yeah, spot on. I wasn't thinking about 600
You'd think servo wave would be standard on road levers.
Well someone else commented that DA and ulteg does have it but im not sure that's correct?
I only snapped spokes when BMXing and it always snapped either where the spokes crossed or at the head where the threads start. 99% of the time it was the latter. J-bend 4 lyf
we gotta get ya on a better mexican lager!
Feel free to donate :)
I’d add the west midlands for JLR, Aston Martin and others.
Triumph in Leicester
Probably just the midlands in general with RR, Bombardier and Toyota to add into the mix
@@PeakTorque Between Leicester and Coventry in Hinckley Mate 👍🏻
I was hoping for a wheelset video 🥴
Noice leg man!
Hi man. I'm on the market for 60mm aero rim brake wheels. Rear brake of my bike is on chainstay and lateral stiffness is very important for my wheels. I know that Winspace Hyper are very stiff. Can you recommend me other brand/model that are with same stiffness or higher, please? Thanks
How heavy are you? I am driving c-razy Carbon rims 60/90. Assembled in China.
@@BimHennemann I am 76 kilos and I will not put over 1000 watts.
I am in search of boost hubs for my 29+ bike for traveling and I ended up with XC or Enduro hubs. I have found very little info and your comment on their differences would be very viable!
Weight, engagement, and spoke count
@@conman1395 well, the spoke count is 32 for both types, engagement point may or may not be different. The weight is the only clear point for differentiating by this point.
CBD - Central business districts. Am American, not a term I use often.
mm stands for millimetre you're probably not familiar. its a unit of measurement, 10 of them in a cm or centimetre, 100 cm in 1 metre. pretty easy to understand right?
@@evanoc12345678 mm always looks small compared to freedom units.
No but you're more familiar with CBD oil? 😅
Shout out @ 18:39 🙂🤙
The frame is not a specialized SL6 it may be a SL5. SL6 doesn’t clamp the frame onto the seatpost it is also not round and has a hidden Allen bolt type that clamps onto the post
Straight pull spokes are a solution looking for a problem...
Knee problem guy it could be your foot position on the pedal you might need a pedal with some float in it.
Never seen a Jbend spoke break at the bend? Have you spent time in a bike shop as a mechanic? Like ever?
Guess im spoilt with cx ray spokes. Only ever broken 1 across all the wheels I've built.
@@PeakTorque thanks for answering the hub-question. Sure there are many aspects to it - but what about *stiffness to weight* on that j-bend/SP comparison? …Hub- or wheel-related asking.
The maintenance aspect clearly goes to j-bend for sure - so I guess it’s better for MTB…
Going straight pull all the way on road 🚴🏻♂️
Me too. While I think straight-pull is more marketing than anything, I've seen plenty of high-quality stainless spokes broken at the bend..but I AM an old-fart :-)
Fuckin A right!!! Giant...SPONSOR THIS GUY!-)
Thank you for the very nice and informative videos. Btw, Porsche 911 are not perfect cars and way too needy when it comes to complex engineering/mechanics. Marketing and nice design covers the mechanical faults....
Wrong.
Nothing is perfect. But once you start looking at how Porsches are made, all of them, not just 911s, it's freaking insane. The way they handle the details is just amazing.
London is alright if you've got 10+ yrs experience and you're chartered, for eg oil and gas project engineer I know who's on 60k/yr with an MEng and CEng
That doesn't sound much of a sallary for a job with travel on demand, two master degrees and a decade of experience. On top of high living expences in London
@@feedbackzaloop I assume it was a joke
@@feedbackzaloop CEng means Chartered Engineer
@@Ditypo ah, not Civil, I see now, thank you for clarifying
Your bike on the wall: deliberately in big big just to pique our annoyance?
No. I was big ringing a climb in denial and ended up in the 28t.
What's the difference (in mm) between wonky and wanky?
1mm
J bend spokes absolutely have snapped at the bend. typically an error of poor limit screws and damage from chain though. also likely found from fatigue on a steel rimmed wheel from the 70s with crappy spokes to begin with, ie: not stainless.
Also i posted a comment on the qr vs ta analysis video, but heres the question:
does the diameter of the mating surface matter when a torsional load matter? Since the mating surface of a QR is only as big as the hub endcap, and the diameter of the endcap of a thru-axle is (slightly) larger, which allows for slightly more side-loads to be applied, assuming no slippage in either case. I am certainly making an assumption that stiffness is being equated to the ability to track in a corner or the resistance to deflect under side loads.
Furthermore, would the cammed action (where peak force applied is when the QR is in the process of being closed) allow for some ability for the fork legs to open back up more than something being screwed in, making a TA feel stiffer?
Do you have a discord server?
Ivan, apply for a visa to work in Australia, the United Kingdom doesn't have much to offer to individuals like yourself.