Genuine replacement parts Upgrade or refresh your Bontrager seatpost. 製品詳細 Compatible with: Madone 2016+, Domane 2019+, Speed Concept 2022+, and road alloy mast cap For use with Bontrager 2-bolt seatpost and seat mast systems For use with Bontrager saddles with 7x10mm rails Consult with manufacturer on compatibility with other saddle brands