Aluminum Road Bike Parts Rear Derailleur Hanger Extension Extender BL
1 Bike Rear Derailleur Hanger. It is used to lengthen the rear dial chain, and apply to mountain flywheel 0T/ 42T/ 46T/ 50T highway flywheel. Made of quality aluminum alloy with CNC machining, sturdy and firm, durable and corrosion-resistant.