CAMPAGNOLO BORA ULTRA TT REAR WHEEL FOR SHIMANO HG11 FOCUSING WHEEL ON TIMEKEEPING FRAMES : Extremely rigid structure in the central movement area, ie at the rear brake for most time trial frames, which avoids any risk of friction against the brake. RIM ENTIRELY IN CARBON HIGH MODULUS FOR HOSE FRICTION SURFACES : new design of full carbon rim with worked surface to allow at the same time minimum weight and precision of braking. BRAKE PADS DESIGNED FOR CARBON WHEELS : The new rubber increases braking performance on wet and dry surfaces without increasing pad wear. FIBER FIBER CARBON SPECIALLY DESIGNED FOR THIS PURPOSEThe innovative design reduces the size of the profile on the rear derailleur side as well as on the other side, making it thinner and therefore more aerodynamic. "WHEEL WHEEL" INTEGRAL GRAPHICS : Campagnolo's legendary "winged wheel" identifies Campagnolo lenticular wheels using the latest carbon fiber technology. BEARINGS WITH CULT ™ TECHNOLOGY : it is the combination of the best ceramic balls and the spans made of Cronitect® special steel: 9 times more fluid than the standard system with steel bearings - eliminates oxidation and keeps performance over time. CONE-BOW BEARING SYSTEM: possibility to easily adjust the balls / bearings - maintaining performance. ALUMINUM HUB STRUCTURE, LIGHT AND EXTREMELY RIGID CASSETTE : compatible with Campagnolo 10 and 11 speed cassettes and Shimano Inc. 9, 10 and 11 speed cassettes.