700c tubular rear wheel Campagnolo continues a tradition of excellence. Light and stiff with a distinctive aerodynamic profile. 50mm deep structural carbon rim. The hub is fabricated from structural carbon that includes Record-class internal components light alloy freewheel and titanium pawl carrier. The aluminum flange on the rear hub enhances torsional stiffness; lateral stiffness increased with G3 double spoking. 21 G3 black aero rear. 740g rear. Black with white and red logo.