S5 Dura-Ace Di2 (2026)

The 2026 Cervélo S5 Dura-Ace Di2 is the fastest road bike Cervélo has ever made — 6 watts quicker and 124 grams lighter than before. Every surface has been optimised, from its deeper aero profiles and refined V-stem to its bayonet fork, delivering unmatched aerodynamic efficiency and stability.

Developed in partnership with Reserve, the S5 features the 57 mm front / 64 mm rear Turbulent Aero wheelset with DT Swiss 180 hubs for maximum real-world speed. Shimano’s flagship 12-speed Dura-Ace Di2 wireless drivetrain with dual-sided power meter ensures instant, precise shifts and accurate power data, while a CeramicSpeed BBright bottom bracket minimises friction for pure performance.

With 34 mm tyre clearance, in-frame storage, and a complete cockpit integration, the S5 is engineered to perform at World Tour level while remaining practical for real-world riding.

Key Features

• 6 W aero gain over previous S5; 124 g lighter overall
• New one-piece carbon V-bar and stem in nine size combinations
• Reserve 57 mm / 64 mm Turbulent Aero wheels with DT Swiss 180 hubs
• Shimano Dura-Ace R9270 Di2 12-speed wireless shifting with dual-sided power meter
• CeramicSpeed BBright bottom bracket for friction-free efficiency
• Vittoria Corsa Pro TLR 700×29 c tyres (34 mm max clearance)
• Cervélo SP34 carbon seatpost + Selle Italia Novus Boost Evo SuperFlow Carbon saddle
• Integrated computer/light mount, rear accessory mount, in-frame storage and twin carbon cages
• Frame sizes 48 / 51 / 54 / 56 / 58 / 61 cm

Complete Build Specification

• Frame – Cervélo S5 carbon, internal routing, 12×142 mm, flat-mount discs
  
• Fork – Cervélo all-carbon Bayonet S5, 12×100 mm
  
• Groupset – Shimano Dura-Ace R9270 Di2 12-speed
  
• Crankset – 54/40 T with 4iiii Precision Pro GEN3+ dual-sided power meter
  
• Cassette – 11-34 T | Brakes – Dura-Ace hydraulic CL900 CenterLock
  
• Bottom Bracket – CeramicSpeed SL BBright for 24 mm spindle
  
• Wheels – Reserve 57 TA front / 64 TA rear, DT Swiss 180 hubs, tubeless-ready
  
• Tyres – Vittoria Corsa Pro TLR G2.0 700×29 c (max 34 mm)
  
• Saddle – Selle Italia Novus Boost Evo SuperFlow Carbon
  
• Seatpost – Cervélo SP34 carbon
  
• Cockpit – Cervélo HB19 handlebar + ST31 stem (one-piece V-bar design)
  
• Accessories – Smartpak 400A top-tube bag, storage rolls, two Arundel Mandible carbon cages