At only 33mm deep, the Campagnolo Bora Ultra WTO 33 has the shallowest wind tunnel optimized (WTO) rim profile of the Ultra family. Every external component of the wheel has been redesigned to maximize aerodynamic efficiency and reduce weight, saving precious energy, and generating greater speed from the same rider input. The Bora Ultra WTO 33's lower weight helps riders to reach heights even faster, change pace instantly, and descend with great speed and confidence Rims are crafted from Campagnolo's Hand Made Ultra-Light Carbon (H.U.L.C.) Rims feature Campagnolo's mirror-like Luxury (C-LUX) finish Undrilled 2-Way Fit rim beds allow for perfect tubeless compatibility without rim tape Carbon fiber front hub body is hourglass shaped to improve aerodynamics, and is securely bonded to a light aluminium hub flange Integrated radial spoke seats ensure perfect alignment Hidden Aero Mo-Mag nipples and slimmer Aero Elliptical spokes in Campagnolo's G3 spoke pattern further enhance performance Ceramic bearings promise almost frictionless rotation Weight: 640 g Specifications ColorGrayDefined ColorGrayFront Axle12mm Thru x 100mmHub/Brake CompatibilityCenter-Lock DiscISO Diameter622 / Road / 29"Rim MaterialCarbonRim Width (Internal)21Tire TypeTubeless Ready ClincherValvePrestaWheel Size700c