How to reduce your aerodynamic drag | Cycling Weekly
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- Опубліковано 14 кві 2018
- It's your body what slows you down. Our tips to reduce aerodynamic drag - from bike to you position. | Subscribe to Cycling Weekly here: ua-cam.com/users/CyclingW...
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road: time saved over 40km ride:
S-works evade skinsuit vs. race cut road kit: 96sec
shaved arms: 19sec
shaved legs: 70sec
aero handlebar: 17sec
shoe cover: 0-30sec
aero helmet (Specialized Evade 1): 42-46sec
aero frame (Specialized Venge): 59sec
aero wheels: 34sec
tight fit jersey: 45sec
bottle on downtube vs. seattube: 25sec
S-works TT helmet vs. Specialized Evade helmet: 20sec
bike computer out front vs stem mount: 8sec
winter kit vs. summer kit: 97sec
watt saved at speed:
skinsuit vs. standard bike jersey/bibshorts: 5-8Watt
aerobike vs. standard bike: 6/15/29Watt at 30/40/50km/h
Castelli skinsuit: 35 watt at 50km/h
S-Works Evade vs. S-Works Prevail 20 watt at 50km/h
80kg rider can save 17sec on a 1km 8% climb (250W) if he loses 5kg
90 degree elbows saves 14% of watts in comparison to straight arms
By raising my stem by 10mm - which isn't very aero- I'm actually able to hold the praying mantis position much longer, thus becoming... more aero. More comfort on the tops and more speed on the hoods, win-win!
I find that following a bus does wonders for my aerodynamic drag.
on that note, I believe renting a bus for important cycling events is much cheaper than buying all this state-of-the-art aero bollocks
I ruined a helmet because of that ... I was following a truck at 55km/h when the driver hit the brakes because a dog was crossing ...
I find taking the bus is even less effort
Enjoyed the video guys !
You forgot to mention an aero helmet.
Agreed. Aero helmet should be a requirement
Narrow aero bar i find makes a big difference. Skin tight clothing and an aero road helmet too. The helmet i have is very wearable unless its a particularly hot day
When I ride aero, different muscles (upper sartorius muscle) seems to be activated in my legs.. any tips on the seating posture when aero so the same leg muscles working as before ???
So how many watts do your triceps have to put out to hold that hoods position?
Wish you guys would have tested bent elbows in the drops which is likely faster than aero on the hoods.
gottta love Ollie's magic wand!
Where did you get your t-shirt Ollie? Mothercare?
Stretch. You will be able to get more aero and for longer.
True
When you guys tested bent elbows on the hoods vs riding in the drops, your rider had straight arms while in the drops. So why not test vs bent elbows in the drops?
They did that video on BikeRadar. Found that bent elbows in the drops was faster but uncomfortable and therefore difficult to maintain for long
if you have a set up that allow you to bend elbow in drop for extended period of time, the handlebar is too high.
You better move the bar down lower, make lower drop more useful/stable for tight corner descend or sprinting. And be aero with L-bend on hood.
What sunglasses are Rupert wearing in this video?
please explain the cost of an aero bike per watt versus an aero kit, aero helmet and overshoes.
Jan Willem Kuilenburg the new 3t strada with enve wheels, dura ace and more exceeds $8,000 retail. So 300 watts would cost you around $30-26 depending on the components of the build. Aero kit (rapha pro team skin suit $350), specialized evade 2 helmet ($270) and over shoes (velotoze $20) is around $2 per watt at 300w.
Even better option is losing weight and making yourself smaller whilst keeping power by being carbed up from fruit and sweet potato.
Thanks for the figures, but I did not explain well.
I meant the gain in watts.
If an aero bike of $8000 saves 20 watts it would be $400 / watt.
If aero kit, helmet and overshoes for $300 saves 20 watts it would cost $15 / watt
Jan Willem Kuilenburg you're right, I was thinking about it in the completely wrong context
Best bang for your buck aero gain are overshoes such as velotoze, then it's close between narrower handlebars and an aero helmet. Aero gloves, jersey and if you're in the drops a lot then shaved forearms help as well
Just get your elbows in and down, then your knees straight up/down. That’s it. Any cycling shorts and jersey works for wind.
How bout leg hair and arm hair does it make a difference, shaving or not?
Shaving your legs saves you about 1-2.5 watts arm hair would be about 1 watt.
If I recall correctly, if you ride 40 km's, you save 1 minute by shaving legs.
SPZ says with shaved legs in 40 km you will be fast 70 seconds
Plus, by shaving your face, arms and legs, you'll get an even bronzed tan and LOOK fast, which is all the time even at the coffee shop
AKA the new baby-look if you shave your head too =)
Where is your data? Is it too hard to ask to do a before and after? Thanks!
In amateur competitions it feels so sad, that you can actually BUY better performance if you can afford expensive gear... Thats not a sport spirit :(
please explain that a lighter bike has nothing to do with aero properties.
Oliver's magic snap
Just do the Superman position 😜
Road skin suits are the best...
You missed the most important tip of all: If you want to reduce aero drag a LOT, ride in a group or peloton. If possible drafting right behind someone larger than you are. An aero bike might be helpful briefly during your stints at the front (depending on gradients and wind conditions), but overall you don't need the extra weight/expense of an aero bike.
Naturally bike manufacturers want help selling aero bikes, hence these videos.
I thought discbrakes adds drag on the wheels?
Andrew N it does, it adds approximately 1 watt
I did some googling. Saw that ZIPP303 with disc and without was tested in windtunnel. The Disc-version had 16% more drag. Not sure what it means in Watt. More spokes, and rotating disc was a thief in drag. So guess non-disc version is the one to have anyway, until you gonna go downhill or ride in wet :)
Andrew N interesting, i didnt know that
It does, but the increase in breaking performance persuades some Pros to use them.
It does but so does a seat post, and you need both to have a functional bike
Another way to make yourself Aerodynamic get a template of a shark fin cut out put it on top of your helmet happy days
As Grham obree and sir Chris hoy said: ”to reduce your frontal erea.. change to the nerrowes bars you can find!!” I got 360mm bars and ternd my levers a bit inside.
Simplest improvement is to add clip-on aero bars, including ITU legal small aero bars. I suspect the reason people won't do this or you're not suggesting it, is that most people want to copy professional racers and use UCI legal equipment. However, most recreational riders are interested in going faster on informal rides, and this will definitely speed you up at couple of kph. As proof of this, I note that when Spinacci's mini aero extensions were legal, non racing amateur were using them and then stopped when the UCI banned them for road racing (20 years ago).
Ilan Vardi they’re not very safe in groups but yeah
Does a Roman nose help?
The superman position it’s where we at right now
Why are the Assos bib shorts so short?!? They are practically underwear
2:05
Owns aero bike, doesn't know what positions on the bike make you aero
Owns aero bike, runs spacers underneath handle bar
Track stand world record
Rupert shave that beard, that's probably worth a couple of watts at 50km/h. Nice show lads. Enjoy the British humor too.
What if we don't want to see more videos of Rupert or Ollie in a skin suit, where do we click???
Everything above 10 mph? 🤔 Does not compute.
swillia6rider. Bit misleading i feel, what is true though is that aero drag rises exponentially while the other component limiting speed, rolling resistance, is a strictly linear increase. Meaning the faster one travels the greater the effect of drag, but given that RR is seperate there is little point in making a connection with drag.
paul stephens Completely agree. Most other sources I've seen suggest where those lines "cross" on the graph is more like 18mph/30kph, and that matches what I feel on the bike. Seems to me like they are seriously reaching on this one to sell the idea that aero is everything (even at slow speed).
Aero-money..
"Where do I put my banana?" A question many of us ask when donning tight lycra.
Aero bikes, aero clothes, aero body position, and...beards??
greg elwood has very little impact as it's in very dirty air
But your testing was BS because you didn't use the same wheels on each bike, put Aero wheels on a standard bike and do the test again!
Reginald Scot what test? This video was all about tips
Reginald Scot they're talking about the actual aero testing they did in the velodrome, which every bike did have the same wheels, not the video from the other day
Ben Connor no this video was an advert to buy an Aero bike.
talk about reducing drag but ride disc brake bike...lol
De-beard. Instant drag reduction
#notificationgang
Top aero trip, buy your mate a cheap moped 👌🏻
Draft a bus
even pros have stopped using aero bikes, all the top race winners are NOT on aero bikes, theres no benefit
JogBird ummm what about tt.
Most Pros use aero bikes. Recently they haven't due to the non ideal road surfaces in recent races, in which an aero bike would be to stiff. At the speeds Pros ride at and to be honest most cyclist do an aero bike will be advantages over a light weight bike in nearly every situation.
Future of road cycling is almost exclusively reserved for aero bikes.
@jogbird - most pros don’t use aerobikes because they have 8 team mates sharing the front 😉
Matty Hayman won Paris Roubaix two years ago on a Scott foil aero bike.....