Shimano dura ace 9100 c40 clincher wheelsetthe shimano dura ace 9100 c40 clincher wheelset is designed to meet professional road racing criteria the lightweight carbon clincher rims have alloy braking surfaces which maintain high performance braking with standard brake pads with rims that are 40mm deep and 24mm wide these wheels provide improved aerodynamics increased rigidity and excellent inertia for sprinters and tt specialists features lightweight carbon clincher 40mm deep 24mm wide