Cannondale C1 Aero 27 Seatpost - 15mm Offset BYOB display The rider makes up 80-90%

The rider makes up 80-90% of total aero drag

and configurations on the market

Zero-loss air chuck with stainless/aluminum internals

Choose closer gear steps or ultimate range by pairing a 10-45t or 10-51t cassette with a 40t or 42t chainring (cassettes and 42t chainring sold separately)

Cannondale C1 Aero 27 Seatpost - 15mm Offset BYOB display The rider makes up 80-90%The D shaped design of the C1 aero 27 seatpost enhances aerodynamics and boosts vertical compliance, reducing muscle fatigue so you stay fresh and fast for the final sprint. Features 27mm deep, D shaped aerodynamic profile fits 2025 Superx, 2025 Synapse, 2020 CAAD 13, 2020 Supersix Evo, Evo SE and Evo CX SmartSense compatible hardware included Full carbon construction for ultimate comfort Mfr Claimed Weight TBC