Reserve Wheels Reserve 99 Disc Turbulent Aero Wheelset - 700 12 x 100/12 x 142 Center-Lock XDR/HG 11R Carbon DT 240. Time trials are perhaps the toughest competitions in modern road cycling. With each rider starting individually and drafting prohibited cyclists must rely solely on their own physical endurance mental strength and technical skills. To minimize air resistance and maximize speed optimizing equipment is of utmost importance. The mixed depth front and rear of the 99 Disc Turbulent Aero wheelset is designed to provide a perfect balance between stability and aerodynamics. A lower profile front reduces reaction to cross winds while the disc minimizes drag.Carbon fiber aero constrction designed to be tested at the highest levels of TT Triathlons and Track racing competitionRear wheel is disc-brake only with a bonded-in rear hub22mm inner width designed for use with tires up to 28c