*It could be the wheels, that I took over from the Endurace. The Roval clx 32 made the side wind stability of the Endurace worse compared to the alloy DT wheels it came with out of the box. Those Rovals are only 32 mm tall and have a very round profile. So, I guess it's not really the rim profile. But the rims have to be fairly light to achive 1350 gr on a disc wheel. So, less gyroscope effect of really light rims vs more heavy alloy rims? The stock Carbon DT wheels that came with the Addict are now on the Endurace, but still unridden and not set up for sale yet. Will make a short ride on it to check everything is OK before the bike will be sold. I will see how it behaves with more heavy wheels (also 35mm tall)
*It could be the disc rotors. Although small in diameter, it's an almost plain surface that could catch a lot of side wind. Complete wrong guess, or could it influence the general behaviour of a bike?
The Addict is 'only' my secound disc bike, so, I not enough to genaralise. With's your experience? Any comparison with an almost identical rim brake bike?
OK, thx! But to be fair, a roadmachine has a very relax front end : slack head angle, a lot a center-front, a long wheelbase and low BB. This all contributes to a very stable ride by nature. An Addict is a pure race machine with direct but stable steering. I guess is't far more sensible to other factors. In 800km, I didn't have the chance to ride the disc version in calm weather. It's been very, very windy for the last couple of weeks, with daily 4 to 5 bf wind. If weather permits, I will do a side to side comparison of both addicts, on the same routes and same weather conditions. But I don't remember in the almost 20.000 miles on the rim version, that wind caused any problem.
But please, if you have a theory / ideas, shoot. This can only be instructive for everyone, as disc become more and more popular.
If your both bikes are identical except the rim vs. disc brake then it is due to the rotor I suppose.
If the behavior in the crosswinds bother you you should maybe look at a different wheelset with even less profile.
I don’t worry about my rotors personally, but I do ride in sustained winds often and have felt two different sensations.
1) While riding in a straight line, variable gusts forcing a steering correction...or strong steady winds making me steer into the wind just to ride straight.
2) The rear wheel feeling like it’s being pushed out in fast corners and forcing me wide. It feels like the whole rear end goes light and you’re about to lose traction.
Phil’s Fondo this year took place during a swell of Santa Ana Winds. The peak of Mt. Hamilton often has steady winds of 30mph. My main method of getting down from San Mateo to Woodside here in the Bay Area is via some windy corridors as well. There are days where I swap out my 5.6s for the 40mm Altos, and there are days where I wish I had 25-30mm wheels.
Belgium. Just like in the Netherlands, we have wind 2 - 3 bf all year long, I'm used to it and like it after all, but the past 2 weeks, we had 4 - 5 bf wind every day, with wind peaks of 50 mph. Not the best conditions to judge a bike , but I have to say, I din't really enjoy the rides due to being throwed around a little too much.
As Tobin said, it's more the sudden wind bursts that are a problem. Steady side wind is easy to cope with, even with the disc bike : you put in a certain amount of countersteer, and no problemo. But as soon as a car pass you, or you have some houses that shield you from wind , the difference in wind pushes you around quite a bit.
I will have a look at the Sram rotors, thx for the tip
That sound familiar to when i moved my seat (and handlebar, of course) too far forward that my center of gravity is way off to the front than what i'm used to. i saw myself sit further back on saddle on hard corner to maintain control and rear end traction then i eventually just move my setup more rearward of the bike to get weight balance i desired. hopefully this is not the case.
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