Cervelo's S5 Ultegra Di2 Disc is their fastest, most aerodynamic road bike that has seen many pro-level victories.

The slippery carbon frame has been tweaked in line with the UCI’s slightly more relaxed regulations, with some deeper tube shapes and a reworked cockpit setup to reduce drag by a few more precious grams. This frame is now only compatible with electronic shifting and has sufficient tyre clearance for 34mm rubber within its sculpted shape.

The instantly-recognisable aerodynamic V-Stem and handlebar arrangement is more adjustable and simpler now, with a small drop in weight into the bargain. Its lauded aerodynamic and handling advantages remain impressive and give the S5 an extremely purposeful-looking stance even when standing still.

Cervelo has taken advantage of its in-house Reserve wheel brand and developed a 63/52mm tubeless-ready carbon wheelset that integrates perfectly into the frame. This not only reduces drag when tested in the wind tunnel but also shows improvements when faced with real-world situations where the yaw angle is constantly changing, leading to more stable handling and added speed.

Ultegra Di2 is Shimano’s second-tier, 12-speed, electronic groupset. It gives virtually nothing away to the range-topping Dura-Ace version in terms of performance and offers near-instant shifting and impressive braking control. The system is part wireless, which means that it can be connected to a GPS head unit or a smartphone via Bluetooth, giving access to more information during and after a ride as well as some function customisation.
HIGHLIGHTS
Cervelo S5 All-Carbon frame with TrueAero tube profiles
Cervelo All-Carbon fork with external head tube nose section
Shimano Ultegra hydraulic disc brakes
Shimano Ultegra Di2 12-speed electronic drivetrain
Reserve 63/52mm tubeless-ready carbon wheels with Zipp ZR1 ST hubs
Cervelo ST35 Carbon V-Stem
TECHNICAL SPECIFICATION
Frame Cervelo S5 All-Carbon, TrueAero tube profiles, integrated head tube to fork configuration, integrated headset 1” x 1-3/8”, 12x142mm thru-axle
Fork Cervelo All-Carbon, tapered S5 fork, external head tube nose section, 12x100mm thru-axle
Headset FSA IS2 1 x 1-3/8
Bottom Bracket CeramicSpeed 24
Stem Cervelo ST35 Carbon V-Stem
Handlebar Cervelo HB14 Carbon
Bar Tape Cervelo bar tape
Front Brake Shimano Ultegra hydraulic disc, with 160mm Shimano MT800 rotor
Rear Brake Shimano Ultegra hydraulic disc, with 160mm Shimano MT800 rotor
Brake Levers Shimano Ultegra R8170 hydraulic
Front Derailleur Shimano Ultegra Di2 8150
Rear Derailleur Shimano Ultegra Di2 8150, 12-speed
Shift Levers Shimano Ultegra Di2 8170, 12-speed
Chain Shimano M8100, 12-speed
Cassette Shimano Ultegra R8100, 11-30, 12-speed
Crankset Shimano Ultegra R8100 52/36t
Front Wheel Reserve 52mm, Zipp ZR1 ST, 24 hole, 25.4mm internal rim width, Center Lock disc interface, tubeless-ready tyre compatible
Rear Wheel Reserve 63mm, Zipp ZR1 ST, 24 hole, 24.4mm internal rim width, Center Lock disc interface, tubeless-ready tyre compatible
Front Tyre Vittoria Corsa TLR G, 700x28mm, tubeless-ready clincher
Rear Tyre Vittoria Corsa TLR G, 700x28mm, tubeless-ready clincher
Saddle Selle Italia Novus Boost EVO Superflow
Seatpost Cervelo SP20 Carbon Aero Post
Accessories Cervelo Handlebar Front Computer/Accessory Mount, Cervelo Rear Accessory Mount