Profile Design Altair 52 Full Carbon Clincher Rear Wheel Altair 52 Full Carbon Clincher Rear 700c x 24H Rear Proprietary carbon fiber 52mm section full carbon clincher rim. Precision machined alloy hubs with sealed cartridge bearings and custom depth flanges for extra stiffness Hand-built assembly. Sapim CX Sprint spokes with hidden nipples for additional aerodynamics Color: UD carbon finish with colored decals, black hubs and black spokes. Weight 930 grams