Cervélo S5 Ultegra Di2The Cervlo S5 Ultegra Di2 is a pure aerodynamic weapon designed to transform every watt into velocity, featuring the iconic V stem and a frame co developed with Reserve wheels for unmatched efficiency. Engineered for professional racing, it balances extreme stiffness with surprising vibration damping and massive tire clearance to keep you fast on both smooth tarmac and rougher sections.