Track Cycling: Velodrome Racing and Training Area - Wheel weight vs aero benefit and spoke count
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05-09-12, 04:49 PM
Kinda thinking about wheels (not really any time soon). Assuming a 50mm (1755g) set and a 88mm (2147g ) set are the same price (Planet-X) would the aero benefit of the 88mm be greater than the weight benefit of a 50mm? Also, for outdoor track use, would something as deep as an 88mm give me troubles if the wind picks up?
Side question, I know there's a ton of info on RBR about the ebay china carbon wheels, but do is anyone personally using these, or know of somebody who is?
One more: Is a 24H rear enough for track use? (Assuming a carbon wheel)
Indoors especially, the deeper rim will not offer a huge advantage. For example the old 41mm deep Shamals are no slower than a Zipp 808 (not sure about the newer Firecrests) at 0 degrees yaw.
Outdoors on a windy track, especially if you are a lighter rider may find the deeper wheel on the front a handful. I often use a Hed Stinger 90 (90mm) on the track outdoors, but if the wind gets up or is blustery I will swap it with a Zipp 404 (58mm). Even at 170 pounds, if blustery I still have to be more aware with the later wheel too...
I think a set of 50 or 60mm rims will be more versatile in the long run. Deeper section rims will have distinct disadvantages in certain conditions. As far as rim vs rim, there is a bit of chatter about the profile of the rim being a reasonable factor. Reasonable in the fact that you're talking very small time gains/differences. There is development of the chinese manufacturers into the 23mm rim width, as per Zipp and HED. I'm keeping a keen eye on this as I'd really love a set of 50 or 60mm rims. I was chatting to a guy about these rims as he has had some experience with importing stuff from China. The rims are fine, but if you were a keen gear changer, then he would suggest going for a different hub and building them yourself. The hubs used are a softer alloy and are prone to threads stripping apparently.
As for 24h rear wheel, I think it's more of a question as to what type of riding you do. I think there was a discussion along these lines not too long ago, and the basic thing is that if you put out any kind of decent power, they can be flexy compared to higher spoke count wheels
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