The shimano dura ace 9000 c35 carbon tubular 11 speed road rear wheel is the pro tours race day choice featuring a 315g ultra light rear rim to boost acceleration performance optbal spoke system enhances wheel rigidity and durability extra wide hub flange maximizes lateral rigidity high strength lightweight titanium freehub body digital cone bearing adjustment for smooth rotation performance shimano angular contact bearings and oversize a7075 alloy axles