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why so heavy?(3 posts)

why so heavy?cstm56
Dec 28, 2001 6:29 PM
I am just wondering how using a 1300g wheel like the mavic comete helps
is the aero gain so big?
please help me understand
disc wheels....C-40
Dec 29, 2001 8:38 AM
Weight is only a detrement when climbing or accelerating. It has no impact when riding on relatively level roads over a narrow speed range.

Disc wheels are used for time trial events held on relatively flat courses, where speed is held relatively constant. The aerodynamic advantage of the disc outweighs the disadvantage of the additional weight in this type of event.

If a time trial is held on a hilly course, riders will choose a lighter spoked wheel that is more approriate for climbing and the larger and more frequent changes in speed.
old technologygimondi
Jan 1, 2002 8:08 PM
I've got a comete in my shop, which actually weighs about 1700gms, thats about twice what the zipp 900 disc hanging next to it weighs. In three years we've sold that zipp disc about a dozen times, and are yet to unload the Mavic. Not a bad wheel, just old technology, hell the zipp disc is lighter than any Ksyrium rear wheel we've ever seen.

But I agree with the above, weight really does not matter compared to aero for TTs, the only real issue is for Ironman distance triathletes who want to use a disc at Lake Placid or other course where the aero is probably good for a ten minute savings, but a heavy wheel will seriously kill you due to moderate climbing, and most likely ruin your run.