A3C High Carbon/Alloy Riser with Integrated Bridge 3/5/10mm Alloy 40mm Carbon
 
The UCI has dictated that riser bridges must be at least 10mm thick. Profile Design has minimised the impact. Full carbon 40mm tall riser with an integrated bridge. This halves the weight of the alloy equivalent

Specifications:  
Max Height: 58mm
Material: Spacer Alloy/Bridge Carbon