Bontrager Seatpost Component for Oversize 7x10 mm Rails Make sure your new Bontrager saddle is correctly adjusted to your old Bontrager seatpost. Bontrager seat post head pieces are specifically designed for a secure interface between seat post and Bontrager saddle.
DETAILS:
- Dimensions: 7x10 mm
- Compatible with Bontrager XXX seatposts only