Shimano dura ace 9100 c40 clincher front wheelthe shimano dura ace 9100 c40 clincher front wheel is designed to meet professional road racing criteria the lightweight carbon clincher rim has an alloy braking surface which maintains high performance braking with standard brake pads with a rim that is 40mm deep and 24mm wide this wheel provides improved aerodynamics increased rigidity and excellent inertia for sprinters and tt specialists features lightweight carbon clincher 40mm deep 24mm