https://m.youtube.com/watch?feature=youtu.be&v=lmqdqcOvrlc
A great watch. Confirms most of what we know, but it has some interesting points like gp4000s2 vs gp5000, tri spoke wheels, helmet visors and aero vs cooling, etc.
I really enjoyed it.
Looks interesting. But keep in mind that it is a sales presentation. He’s selling his products.
Looks interesting. But keep in mind that it is a sales presentation. He’s selling his products.
marketing benefit for sure. But he does not talk a ton about wheels (although it is covered). His line “everyone says their wheels are faster, including us†was funny. It is a head to toe review on various aero gains.
I liked that his data was at 35km/hr which is pretty applicable to mortals.
Great informative video. Thanks.
https://youtu.be/lmqdqcOvrlc?t=504
Cube Aerium - is currently aerodynamically the fastest bike in world.
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Thanks for posting!
I think I will be riding 23 GP4000s on the front and 25 GP5000 on the rear. Which kind of makes me happy since I just tore up my 23 GP5000.
Hambini gets a mention too… well from the audience, maybe a homages to ST… in any event I will head over to the swissside website to see what they have posted on rotational drag.
Missed what he said about Tri-Spokes… What was it?
Missed what he said about Tri-Spokes… What was it?
Something to the effect that they are not that great due to unpredictability of side forces, especially in gusts and with tri-spokes. Spoke location when the wind hits can make for varying forces based on where the spokes are at the moment in time. And maybe rotational drag sucks vs bladed spokes… but i may be making that last part up. Rotational drag is not something that traditional wind tunnel methods can measure.
Missed what he said about Tri-Spokes… What was it?
Not god for rotational drag, stability problems in crosswinds.
I find the unpredictability due to side forces interesting. I have raced Kona and ridden the descent from Hawi many times while there training on varying types and depth wheelss. Direct gusty side winds are the worst I have experienced riding there and there certainly have been some white knuckle ride descents where I have just pedalled and hoped for the best. I race and will continue to race Kona including this year on a set of Hed GT3s most impart due to they are certainly a less scary experience in gusty strong winds. The H3 was a little more affected buy guts but IMO no more than a 90mm front. Maybe the fact that they don’t make a tri spoke he is as someone mentioned earlier a salesman for Swissside. On a side note there was a thread about tri spokes at the TDF and did cyclists know something triathletes didn’t. There was a lot of talk of sponsors but after the fact I noticed Trek who you think would run on the front a deep Bontrager Aeolus wheel were running blacked out Pro tri spokes.
Swisside apparently developed a trispoke… yet abandoned the design. Take what you will but i have learned that what the pros do is not always based on best data… half the battle is often in convincing them to abandon preconceived notions. Josh p. Had some good stories of that with pro tdf teams on his marginal gains podcast.
Cube Aerium - is currently aerodynamically the fastest bike in world.
Thing just looks damn fast, so I’m not surprised. I think they bench marked it with the P5, so I wonder how much faster is is than the gold standard. I do think they could have done a better job with the nutrition/hydration. They look high compared to the plasma and even the Canyon setups.
I think whatever Sky/Enios use is the best indicator. They were using Hed tri spokes badged as Pro-totyoe when Pro didn’t make a tri spoke and for the climbs in this tour are using Lightweight wheels not sponsors wheels. They are using the best data and you can’t tell me Trek wouldn’t be using de-badged tri spokes for a good reason. Just my 2c worth…
Where in the video does he talk about the 4k vs 5k?
Where in the video does he talk about the 4k vs 5k?
Did you even watch the video? Try watching it at 50:50.
No, I did not. I don’t have an hour 15 to blow on youtube.
Swisside apparently developed a trispoke… yet abandoned the design. Take what you will but i have learned that what the pros do is not always based on best data… half the battle is often in convincing them to abandon preconceived notions. Josh p. Had some good stories of that with pro tdf teams on his marginal gains podcast.
True, or maybe crosswind stability isn’t as much of an issue when the yaw angles are always in the low single digits because your a pro and can pedal at 50-60kph in a TT.
Missed what he said about Tri-Spokes… What was it?
Not good for rotational drag, stability problems in crosswinds.
Nah, trispokes tend to be good for rotation. That’s their forte.
Missed what he said about Tri-Spokes… What was it?
Not good for rotational drag, stability problems in crosswinds.
Nah, trispokes tend to be good for rotation. That’s their forte.
Do you have any data to back that up? I’ve heard that said before, but rotational drag data is pretty hard to come by. But definitely agree with him about stability problems in crosswinds based on my experience with them many years ago.
There is the old study on the aeroweenie site, though the differences they measure seem a bit high. The most recent evidence probably comes from AeroCoach. They test the Jet 6 and 3+. These wheels have identical rim profiles, so spoke and hub shape is really the only difference. The 3+ is half a watt better at 30 mph on a P5 on the track (low yaw). Add another watt or 2 for a wide forked bike like the SC or Pinarello.
I am guessing a company has to think long and hard about the ROI on a trispoke design. You usually on sell a front wheel and the gains are pretty small. Now what I would like to know is if a 90mm deep trispoke would work. Deeper wheels have shorter spokes, so less rotational drag. Maybe that 45-60 mm depth of the HED trispoke is about the best you can do