Cervélo S5 Ultegra DI2 Carnelian 12-Speed Carbon Aero Bike 2026 The 2026 Cervélo S5 Ultegra DI2 Carnelian continues to dominate when it comes to aerodynamic performance. A favorite with the biggest names in the peloton, like Wout van Aert and Simon Yates, this high-end race bike returns with even sharper lines, an optimized one-piece cockpit, and Reserve 57|64 wheels designed specifically for this frame. It’s 6.3 watts faster, 124 grams lighter, and just as stable as ever. Equipped with Shimano Ultegra Di2 12-speed electronic groupset and a 4iiii power meter, this S5 has everything to appeal to demanding cyclists looking for a high-performance, modern bike. Fork Cervélo all-carbon, Bayonet S5 model Headset FSA IS2: top 1-1/8 (36° x 45°) / bottom 1-3/8 (36° x 45°) Seat post Cervélo SP34 carbon Saddle Selle Italia Novus Boost EVO SuperFlow saddle with titanium rails Front derailleur Shimano Ultegra Di2 R8150 Rear derailleur Shimano Ultegra Di2 R8150 Cassette Shimano Ultegra R8100, 11-34 teeth, 12 speed Chain Shimano M8100 Crankset Shimano Ultegra R8100, 52/36 teeth, with 4iiii Precision Pro GEN3 power meter (dual measurement) Bottom bracket FSA threaded BBright for 24mm axle Tires Vittoria Corsa Pro TLR G2.0 700 x 29c Maximum tire width 34 mm (measured) Accessories supplied Front mount for computer or accessory (Cervélo Computer Mount 887) Cervélo Rear Accessory Mount One-piece handlebar and stem Cervélo HB19 Carbon with “Plus-Four” geometry Hanger width by size 48 cm : 36 cm 51 cm : 38 cm 54 cm : 40 cm 56 cm : 40 cm 58 cm : 40 cm 61 cm : 40 cm Stem length depending on size 48 cm: 80 mm 51 cm: 90 mm 54 cm: 100 mm 56 cm: 100 mm 58 cm: 110 mm 61 cm: 120 mm Seatpost offset by size 48 cm: 0 mm 51 cm: 0 mm 54 cm: 0 mm 56 cm: 0 mm 58 cm: 15 mm 61 cm: 15 mm Front thru axle Cervélo Aero Thru Axle, M12 x 1.5mm, 122mm Length Rear thru axle Cervélo Aero Thru Axle, M12 x 1.0 mm, length 169 mm Front wheel Reserve 57TA, DT Swiss 240 hub, 12 x 100 mm, 24 spokes, centerlock mounting, tubeless compatible Rear wheel Reserve 64TA, DT Swiss 240 hub, 12 x 142 mm, HG freehub body, 24 spokes, centerlock mount, tubeless compatible Gear levers / brakes Shimano Ultegra R8170, with hydraulic disc brake Crank length depending on size 48 cm: 165 mm 51 cm: 165 mm 54 cm: 170 mm 56 cm: 170 mm 58 cm: 172.5 mm 61 cm: 172.5 mm Brake discs Shimano CL800, centerlock mount
