Brompton Advanced Chain Tensioner – 4 & 12 Speed

The Brompton Advanced Chain Tensioner for 4 and 12-speed drivetrains refines one of the bike’s most critical components. Designed for smoother chain management and improved durability, it maintains consistent tension across shifts while supporting the precise folding geometry Brompton is known for. A small upgrade that delivers a noticeably cleaner, more reliable ride.