Proprietary carbon fiber 80mm section carbon clincher rim with aluminum bead and braking surface. Proprietary precision machined alloy hubs with custom depth flanges for extra stiffness. Sapim CX Sprint spokes with hidden nipples for additional aerodynamics. Sealed cartridge bearings Hand-built assembly. Includes QR, valve extenders, spoke tool, extra spokes & nipples (2 front, 4 rear). Size: 700c x 20H Front/24H Rear, Radial front, 2X rear. Color: UD carbon finish with colored decals, black hubs and black spokes. Weight: 1812 grams (w/o QR). * Wheels come standard with a Shimano/SRAM compatible freehub. Campagnolo freehub option is sold separately.