Whether racing cyclo cross bikes or any high end race bike with disc brakes speed counts making cosmic pro carbon sl t disc your go to tubular wheelsetthe rim is taken directly from our paris roubaix winner cosmic carbone 40 t its wide at 25mm to offer more tire support and improved aerodynamics and its full 3k carbon lay up is built to last and to resist any impactdisc specificbecause 90 of the riders weight is transferred to the front wheel when braking hard weve beefed up the front wh