Lightweight sprung type chain tensioner.. Replaces conventional derailleur gear mech.. Variable tension and position (can be used on suspension frames with varying chain length - or rigid frames.). Superlight CNC alloy body, pivot bolt and sealed pulley.. Supplied with 2 springs to provide "pull up" or "push down" function.. Superlight CNC alloy body.. Sealed bearing CNC alloy pulley.. Steel no-jump guide cage.. Variable tension and direction..
Best Price: £21.99 from Merlin Cycles