Cervélo S5 Ultegra Di2 (2026)

The 2026 Cervélo S5 Ultegra Di2 continues the legacy of one of the fastest aero road bikes ever created. Now 6 watts faster and 124 grams lighter than the previous generation, the latest S5 refines Cervélo’s sprint-dominating platform with deeper aerodynamic shaping, improved integration and the same confidence-inspiring handling that has made it a WorldTour favourite.

The redesigned front end combines the Bayonet S5 fork with Cervélo’s signature V-stem design and fully integrated HB19 carbon cockpit, delivering exceptional aerodynamic efficiency while maintaining precise steering and stability at high speeds. Developed alongside Reserve, the S5’s purpose-built 57 mm front and 64 mm rear Turbulent Aero carbon wheels maximise real-world aerodynamic performance and rolling speed.

This build features Shimano Ultegra Di2 12-speed electronic shifting paired with powerful hydraulic disc brakes for smooth, reliable performance in all conditions. A factory-installed 4iiii Precision Pro GEN3+ dual-sided power meter provides accurate performance data, while Vittoria Corsa Pro tubeless tyres offer excellent grip and efficiency for fast road riding.

Designed with modern race practicality in mind, the S5 includes clearance for tyres up to 34 mm and uses Cervélo’s BBright press-fit bottom bracket standard for maximum stiffness and efficient power transfer. The result is a complete aero race system built for riders who want uncompromising speed.

Key Features

Cervélo S5 aerodynamic carbon frame with fully internal cable routing
Shimano Ultegra Di2 12-speed electronic drivetrain
4iiii Precision Pro GEN3+ dual-sided power meter
Reserve 57 mm front / 64 mm rear Turbulent Aero carbon wheelset with DT Swiss 240 hubs
Cervélo HB19 one-piece carbon cockpit for maximum aerodynamic efficiency
Bayonet S5 fork and integrated V-stem front-end design
Vittoria Corsa Pro TLR tyres (700×29c) with clearance up to 34 mm
BBright press-fit bottom bracket for maximum stiffness and efficient power transfer
Cervélo SP34 carbon seatpost with Selle Italia Novus Boost Evo SuperFlow saddle
Integrated computer mount and rear accessory mount included