Cervelo S5 Ultegra Di2 Road Bike

The Cervélo S5 is a sport-wide benchmark for speed and aerodynamic efficiency, with the race results to back it up. From Wout van Aert winning the green jersey by the biggest margin of victory in modern history, to Simon Yates riding himself into the Magnolia Rosa jersey, S5’s iconic V-stem and bayonet fork are a fixture at the front of the professional peloton. The new S5 builds on that legacy of speed by getting even faster. The new bike 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 co-developed the new wheels specifically for use in the S5 frame, completing the aerodynamic system. All handlebar sizes are UCI-legal, even in light of the most recent regulations change. 

• Pure Speed
  The S5 is a sport-wide benchmark for speed and aerodynamic efficiency—with the race results to back it up. From Wout van Aert winning the Green Jersey by the biggest margin of victory in modern history, to Simon Yates riding himself into the maglia rosa, S5’s iconic V-stem and bayonet fork are a fixture at the front of the professional peloton. The new S5 builds on that legacy of speed by getting even faster.
  
• Aero Aero Aero
  The new S5 is 6.3 Watts faster than its predecessor. These gains are realised primarily at the front end of the bike, but the integration of the asymmetric profiles of the seat tube and rear wheel is a significant source as well. Cervélo has long been the aerodynamic leader in the peloton, and we’re confident that the new S5 is at least 5 Watts faster than the bikes of our competitors
  
• One-Piece Handlebar/Stem
  HB19 uses our “Plus-Four” concept, meaning the dimension at the hoods is 4cm narrower than in the drops (e.g. 38cm/42cm). This approach helps riders maintain a more aero body position while their hands are on the hoods, and provides stability in the drops for descending and sprinting. All bar sizes are UCI-legal, even in light of the most recent regulations change.
  
• Not just faster. Lighter, too.
  Despite an increase in surface area, the new S5 is 124 grams lighter than its predecessor. While the increase in fork and head tube depth added weight, we optimised the layup and hardware to make the system lighter.
  
• Reserve 57|64 Designed for S5
  The new Reserve 57|64 wheelset was co-developed by Reserve and Cervélo, and designed for use in the new S5. The rear wheel’s asymmetry matches the seat tube, ensuring air flows smoothly over both. The new wheelset is 3 Watts faster than the 52|63 wheels and weighs the same.
  
• One Peace of Mind
  The new S5’s one-piece bar and stem are a big part of the bike’s increase in aerodynamic performance, but aerodynamic improvements are limited if the bike doesn’t fit you perfectly. We made nine different size combinations, and when you buy an S5, your Authorised Cervélo Retailer will help you get the right bar/stem combo for no additional cost.

• Product Name: Cervélo S5 - Ultegra Di2
  
• Manufacturer: Cervélo Bikes
  
• Activity: Cycling
  
• Gender: Men
  
• Material: Carbon
  
• Usage bikesport: Road Bike
  
• Chain: Shimano M8100
  
• Cassette: Shimano Ultegra R8100
  
• Shifter: Shimano Ultegra Di2 R8170
  
• Rear derailleur: Shimano Ultegra Di2 R8150
  
• Front derailleur: Shimano Ultegra Di2 R8150
  
• Bottom bracket: FSA | BBright
  
• Chainring ratio: 52-36
  
• Crankset: Shimano Ultegra R8100 | 4iiii Precision Pro GEN3+ Dual Sided Powermeter
  
• Brakes: Shimano Ultegra R8170 | 160/160mm
  
• Wheels: Reserve 57TA / 64TA
  
• Seatpost model: Cervélo SP34 Carbon
  
• Saddle: Selle Italia NOVUS BOOST EVO SuperFlow Ti
  
• Handlebar: Cervélo HB19 Carbon
  
• Stem: Cervélo HB19 Carbon
  
• Fork: Bayonet S5
  
• Headset: FSA IS2
  
• Frame: Cervélo S5 All-Carbon
  
• Shifting System (Manufacturer): Shimano
  
• Gear ratio: 11-34
  
• Shifting Type: Chain - Electronic
  
• Brake type: Disc Brake
  
• Wheel size: 28" (622mm)
  
• Bike special accessories: Shimano charger
  
• Seatpost: Rigid seatpost
  
• Rear Triangle: Unsuspended
  
• Tires: Vittoria Corsa Pro TLR G2.0 | 700x29c
  
• Max tyre width: 34mm
  
• Brake actuation: Hydraulic
  
• Model year: 2026
  
• Collection: Full year
  
• Fork construction: Rigid Fork
  
• Cable routing: Fully integrated
  
• Product Series: Cervélo - S5
  
• Number of Gears: 2 x 12