Cervelo CARBON RAIL SEAT POST HEAD, 7MM X 9MM RAILSThe Cervelo Carbon Rail Seatpost Head is engineered to fit carbon saddle rails measuring 7 x 9. 6mm, providing a secure and precise connection for high performance saddles. Compatible with Cervelo seatposts including SP CER ATT ACB L, SP CER UCI1 ACB L, SP CER UCI2 ACB L, and SP CER SP15 ACB L, this component is designed to maintain the integrity and adjustability of your bikes cockpit. Its lightweight carbon construction supports optimal rider

With a new Bluetooth battery and Shimano's E-Tube Wireless app

Includes 2 x CR1632 batteries

[six smallest cogs] nickel-plated Cro-Moly Freehub Type Shimano 11-Speed Road Carrier Material carbon fiber

5mm on wide spindle cranks for 46-52t chainrings

E-BIKE READY - NO

Hi-Vis Color for Easy Identification

A natural evolution forward

Ideal for riders who demand consistent gear changes and frame protection

Designed for tightening stems

Brakes Shimano BR-R8170 Hyd

Riding involves easy transitions from standing or sitting

CX MFG Code 75E6S00A23A25 UPC Code 8021890580245