Cervélo S3 Ultegra Di2 Disc £5,699 | 7.66kg (16.89lb)

Cervélo has given its S-series bikes an overhaul, redesigning both the S5 and the S3 models with a particular focus on frame stiffness and aerodynamics.

Unlike the new Cervélo S5, the latest S3 is available as both a rim brake and disc-brake bike. The new disc-brake version uses Cervélo’s True Aero technology, which comprises a combination of specific tube shapes, sizes and designs to improve the aerodynamic flow across the bike. At the front end, the bike has new frame and fork shaping and all the cables are tucked neatly inside the cockpit – made possible by a new upside-down modern take on the quill stem.

Cervélo claims these changes have saved 13 watts at 40kph over the outgoing frame.

The brand has tried to give the S3 a ride quality that’s distinct from the more aggressive S5. The S3’s stack is 16mm higher than the