R4B offers a carefully crafted blend of comfort and light weight, fit, power transfer and aerodynamic efficiency.

The R4B’s injected carbon fiber outsole is stiff for power transfer and sculpted to aid aerodynamics. It combines with the proven supportive and comfortable fi’zi:k Cycling Insole with sculpted footbeds and supportive heel to ensure that every precious watt goes straight into your pedals.

Material: Microtex laser perforated
Outsole: Injected Carbon Vented
Closure system: Boa IP1-A and Micro Straps
Insole: fi'zi:k cycling Insole
Weight: 254 g