The Shimano RD-TY300 6/7-Speed Rear Derailleur provides a smooth and consistent gearing experience on city and countryside commutes. This Shimano rear derailleur features a bracket mount, SIS index shifting, and SGS cage for wide-range gearing up to 34T. Durable 13-tooth pulleys reduce noise while light-action shifting ensures smooth performance. Quick to install, it suits 6-7 speed drivetrains. Buy your bike gears & bike tools at Halfords, the UK's largest bike accessories retailer.