Brompton Chain Tensioner Set for 2 or 6-speed

The jockey wheels on the chain tensioner are made of a durable nylon material. Over time these will wear and could help cause the chain to slip when under load. It is common to replace the complete chain tensioner assembly - but it's possible to replace just the jockey wheels and associated components. Suitable for 2 or 6-speed drivetrains on Brompton fold bikes.