I thought I'd do some research so found historical weather data and found that the air pressure was slightly higher in 2020 but only 0.5 psi :). However the humidity was 7% higher in 2021 and had lower air temperature by 3 degrees F which would have resulted in lower max speed. The wind direction was about the same however in 2020 the wind speed was 36 kmh compared to 25kmh in 2021. There were also more gusts in 2020. Ideal conditions would be air pressure less than 28.82 inHg, himidity less than 57%, and tailwind of above 36kmh. Hope this doesn't fry your brain
Hi Tom do you know where to buy some Dura Ace C75 wheels from because I cant seem to find any on the internet, if you could tell me where you got yours from it would help heaps. Thanks Ethan
Well done. Yeah sketchy at that speed! Had this great Op with the wind to get my PB down Evans pass ChCh but the road is so full of potholes and bumps from rocks after the quake, dodgy repairs, and big trucks ruining the surface I felt like I needed a full-sus so pulled out after hitting 89kph(3k's below my PB) as worried my fork might break! Yeah the rider on the bike is the most un-aero thing everything else being equal. Think a skinsuit and some booties/overshoes has a bigger effect than an aero frame by itself? 2 bottles in the holders makes that inner triangle smaller and therefore more aero, so make sure you do that next run! :)
I had a crazy speed wobble at 72 kph / 45 mph downhill on my steel gravel bike with wide tires. Granted this might not have been an issue with a stiffer frame on a less windy day. I have no inclination to ever go any faster after that experience.
I've found it can be extremely hard to improve your time on a fast, short descent. At 100km/hr or 62mph, you travel at 88 ft/sec or 27metres/sec. So to go 1 second faster you need to be able to be 27 meters ahead of your previous best. GPS just doesn't provide the granularity necessary for accuracy at these speeds/distances.
I don’t think that what you say about the bike not mattering is quite right Tom - it’s just that the bike frame isn’t the main determinant of the wind resistance, that would be your body position. If you can experiment with that and dial that in you can probably squeeze some extra time out - fastest downhill on road is about 140kmh I think so faster is possible. Don’t discount the importance of your tyres rolling resistance too and maybe switch to the lowest rolling resistance tyres (something like Vittoria Corsa Speed G+ 2.0) since rolling resistance also makes huge difference. And please also be careful!! 😅
I wouldn't say definitively that it doesn't matter. You were still going over 20mph and being more aero improves air flow by reducing air turbulence. I wouldn't use GPS speed data from Strava. Use a speed sensor like the Garmin speed sensor. As long as there's a fresh battery and it's been calibrated properly it will give you your true speed data. As for why you didn't beat your previous record that could due to several factors: head wind and tail wind, lack of confidence, difference in cornering speed, braking etc etc.
maybe try it on a more heavy bike or a less aerodynamic one to see the differences between high end and low end bikes (the heavy one may even be faster!)
love the paint job. everything depends on the gradient and curves. in 1974 went down a mountain hill at 60 mph. leather helmet, nothing aero, no glasses...we learned how to squint no shit. where i am now there is Mount Washington on Vancouver Island BC, about 20 km from my home. the first few kms up are around 18 percent. i climbed up maybe a km, and used my brakes on my hybrid bike to stay below 75 km/hr. too dangerous with curves. one tourist dude got too brave in 2020 and had to be airlifted out after a bad crash. it does take lots of guts to go fast, and decent handling skills... Please everyone check your tires and gear before doing these things. pretty much every ride i do there is a hill i can hit 70 km/hr on easily and safety is always my priority over speed. best wishes to all, have fun and ride safely
Mate love your content, UA-cam recommend me one of your vids, one of the best cycling channels out there, keep up the good work man.
love the Gulf paint job!
Great video Tom,👏 thought the Scott would beat the supersix by a wee bit more, please do it on the trek🤞
Beautiful bike - looks fast just sitting still!
I thought I'd do some research so found historical weather data and found that the air pressure was slightly higher in 2020 but only 0.5 psi :). However the humidity was 7% higher in 2021 and had lower air temperature by 3 degrees F which would have resulted in lower max speed. The wind direction was about the same however in 2020 the wind speed was 36 kmh compared to 25kmh in 2021. There were also more gusts in 2020. Ideal conditions would be air pressure less than 28.82 inHg, himidity less than 57%, and tailwind of above 36kmh. Hope this doesn't fry your brain
Brain is cooked haha
Hi Tom do you know where to buy some Dura Ace C75 wheels from because I cant seem to find any on the internet, if you could tell me where you got yours from it would help heaps. Thanks Ethan
Put a disc wheel on the back 🔥🔥🔥🔥🔥🔥🔥🔥💪💪💪💥💥💥 let it rip bro
Great paintjob, those DA wheels almost seem rare nowadays
Nice vid Tom. Great job on passing 100kph again
Cheers mate
Well done. Yeah sketchy at that speed! Had this great Op with the wind to get my PB down Evans pass ChCh but the road is so full of potholes and bumps from rocks after the quake, dodgy repairs, and big trucks ruining the surface I felt like I needed a full-sus so pulled out after hitting 89kph(3k's below my PB) as worried my fork might break! Yeah the rider on the bike is the most un-aero thing everything else being equal. Think a skinsuit and some booties/overshoes has a bigger effect than an aero frame by itself? 2 bottles in the holders makes that inner triangle smaller and therefore more aero, so make sure you do that next run! :)
I had a crazy speed wobble at 72 kph / 45 mph downhill on my steel gravel bike with wide tires. Granted this might not have been an issue with a stiffer frame on a less windy day. I have no inclination to ever go any faster after that experience.
I've found it can be extremely hard to improve your time on a fast, short descent. At 100km/hr or 62mph, you travel at 88 ft/sec or 27metres/sec. So to go 1 second faster you need to be able to be 27 meters ahead of your previous best. GPS just doesn't provide the granularity necessary for accuracy at these speeds/distances.
Hope you can try it again with cheap carbon bike like from giant or merida
Not sure if this was the bike I saw last Sunday’s event. Love this video 👍🏻.
In wellington?
@@CyclingTom oh yep at the cycle classic event 😊
I don’t think that what you say about the bike not mattering is quite right Tom - it’s just that the bike frame isn’t the main determinant of the wind resistance, that would be your body position. If you can experiment with that and dial that in you can probably squeeze some extra time out - fastest downhill on road is about 140kmh I think so faster is possible. Don’t discount the importance of your tyres rolling resistance too and maybe switch to the lowest rolling resistance tyres (something like Vittoria Corsa Speed G+ 2.0) since rolling resistance also makes huge difference. And please also be careful!! 😅
Very cool video but how about doing a comparisson with a citybike.
I don't suspect the Scott Foil is more aero than the Evo - bigger chainring might help... or a SystemSix
I wouldn't say definitively that it doesn't matter. You were still going over 20mph and being more aero improves air flow by reducing air turbulence.
I wouldn't use GPS speed data from Strava. Use a speed sensor like the Garmin speed sensor. As long as there's a fresh battery and it's been calibrated properly it will give you your true speed data.
As for why you didn't beat your previous record that could due to several factors: head wind and tail wind, lack of confidence, difference in cornering speed, braking etc etc.
You should do this test with sworks wenge.
dont you worry about your wheels getting overheating?
I suspect that camera on your chest will have messed up any aero gains you might have seen from the frame or the skin suit!
maybe try it on a more heavy bike or a less aerodynamic one to see the differences between high end and low end bikes (the heavy one may even be faster!)
it won't be.
Song please?
A weighted vest under the jersey might make you even faster
love the paint job. everything depends on the gradient and curves. in 1974 went down a mountain hill at 60 mph. leather helmet, nothing aero, no glasses...we learned how to squint no shit. where i am now there is Mount Washington on Vancouver Island BC, about 20 km from my home. the first few kms up are around 18 percent. i climbed up maybe a km, and used my brakes on my hybrid bike to stay below 75 km/hr. too dangerous with curves. one tourist dude got too brave in 2020 and had to be airlifted out after a bad crash. it does take lots of guts to go fast, and decent handling skills... Please everyone check your tires and gear before doing these things. pretty much every ride i do there is a hill i can hit 70 km/hr on easily and safety is always my priority over speed. best wishes to all, have fun and ride safely
Scott Foil FTW! Can you do it with the new bike frame you received? After the build of course
Yeah of course
Still the best looking rig in the fleet &what's going on with that bloody haircut!???
Custom paint some aero wheels for that bike mate
I'd never thought about doing wheels
Great.
Thought you might beat that your looking like your carrying some more timber so gravity and all that
Take off bottle cages. 😆
If you had two full bottles you would of got the KOM
lmao remove that go pro