Aluminum Bike Rear Derailleur Hanger Extender for 34T-52T Freewheel (Black)
£5.87
After the extension tail hook is installed, the rear derailleur guide wheel and the large gear have sufficient space and long gearing. Compatible with mountainous 40/42/46/50/52T, etc., highway 34/36/40/42T and other freewheels.
