The CUBE RD C:68X® is our stiffest, lightest road shoe, designed to deliver the best performance for road riding perfectionists. The carbon fibre features a replaceable heel stud to help prolong service life. Twin disc fastening allows both fast entry and exit and an extremely secure closure, reinforced by a hard-wearing Dyneema ® wrap layer for durability even in the harshest conditions. The toe box and heel cap are both reinforced for extra protection, the upper is perforated to provide ventilation, and an NF Ergonomics insole ensures the best possible cushioning and pressure distribution for optimum pedalling.