A s newto make the most of punchy terrain with repeated short steep climbs twisty descents and fast flats any high end race bike with disc brakes should be set up for speed and for the truly competitive this cosmic pro carbon sl c disc is the go to carbon clincher disc wheelsetthe unique rim design makes it super strong while its unique shape also provides extremely low rolling resistance and high comfort thanks to a wide 17mm inner rim that perfectly complements the 25mm tires the best a