The Cervlo R5 Ultegra Di2 is a featherweight climbing machine engineered for performance. Built around Cervlos redesigned super-lightweight carbon frame, this model marries race-level engineering with Shimanos responsive 12-speed Ultegra Di2 electronic shifting.

With a frame weighing as little as 651 g (size 56) and refined tube shaping that improves stiffness where it matters, the R5 delivers agile, confident handling without compromising comfort.

Cervlo R5 Ultegra Di2 Specs at a Glance

• Frame & Fork: Ultra-light carbon frame (~651 g, size 56) with increased stiffness; all-carbon tapered fork.
• Drivetrain: Shimano Ultegra R8170 Di2, 12-speed electronic shifting with 52/36T crankset and 1134T or 1130T cassette options.
• Wheels: Tubeless-ready Reserve 34/37 mm carbon wheels, paired with DT or Zipp hubs.
• Components: Integrated Cervlo HB13 or HB18 carbon cockpit, carbon seatpost (SP24), and reinforced Reserve rear section for stability under load.
• Brakes: Shimano Ultegra hydraulic disc brakes with Center-Lock rotors.
• Additional Features: Optional power meter integration (4iiii), ceramic BBRight bottom bracket, and accessory mounts for bike computers.

Design Benefits

1. Ultra-Light Performance: The featherweight build excels on climbs and maintains nimble handling without fragility.
2. Balanced Stiffness: Optimized frame stiffness for power transfer and confident corneringwithout sacrificing compliance.
3. Precision Shifting: Smooth and reliable electronic shifting enhances focus and aerodynamics in the drops.
4. Integrated & Clean Design: Sleek cockpit, internal routing, and integrated mounts offer clean aesthetics with functional versatility.
5. Ready-to-Race Components: High-performance wheelset, cockpit, and braking package provide ready-to-go race capability.

Final Take

The Cervlo R5 Ultegra Di2 is the climbing enthusiasts dream: ultra-light, stiff, and elegantly integrated. Whether tackling steep gradients or logging extended climbs, this race-ready bike translates every watt into motion with confidence and grace.