Cervelo S5 Ultegra Di2 - 2026

The new S5 is over 6 Watts faster than its predecessor, 124 grams lighter, and retains the handling, poise, and stability that riders everywhere love. The biggest changes are at the front of the bike, where the most significant aerodynamic performance comes from. The fork legs and head tube got quite a bit deeper, and the all-new, one-piece handlebar/stem builds on the original V-stem concept—and gets even faster.

Cervélo and Reserve co-developed the new Reserve 57|64 Turbulent Aero wheels specifically for use in the S5 frame, completing the aerodynamic system.

The new S5 is 6.3 Watts faster than its predecessor. These gains are realized primarily at the front end of the bike, but the integration of the asymmetric profiles of the seat tube and rear wheel are a significant source as well. Cervélo has long been the aerodynamic leader in the peloton, and they’re confident that the new S5 is at least 5 Watts faster than the bikes of their competitors.

SPECIFICATIONS
BIKE FRAME – Cervélo All-Carbon
FORK – Cervélo All-Carbon, Bayonet S5 Fork
FRONT WHEEL – Reserve 57TA, DT Swiss 180, 12x100mm, 24H, centerlock, tubeless compatible
REAR WHEEL – Reserve 64TA, DT Swiss 180, 12x142mm, HG freehub 24H, centerlock, tubeless compatible
FRONT TIRE – Vittoria Corsa Pro TLR G2.0 700x29c
REAR TIRE – Vittoria Corsa Pro TLR G2.0 700x29c
CRANKSET – Shimano Ultegra R8100 w/ 4iiii Precision Pro, GEN3+ Dual Sided
CHAINRING – 52/36T
BOTTOM BRACKET – FSA, BBright thread together for 24mm spindle
FRONT DERAILLEUR – Shimano Ultegra R8150
REAR DERAILLEUR – Shimano Ultegra R8150, 12-speed
SHIFT LEVER – Shimano Ultegra R8170
CASSETTE – Shimano Ultegra R8100, 11-34, 12-Speed
CHAIN – Shimano M8100, 12-speed
FRONT BRAKE – Shimano Ultegra hydraulic disc,. Shimano CL800 Centerlock rotor
REAR BRAKE – Shimano Ultegra hydraulic disc,. Shimano CL800 Centerlock rotor
HANDLEBAR/STEM COMBO – Cervélo HB19 Carbon
SEAT POST – Cervélo SP34 Carbon
SADDLE – Selle Italia NOVUS BOOST EVO SuperFlow Ti