Rear Derailleur Hanger Extension Aluminum Alloy Tail Hook Extension Extender Bike Frame Gear Tail Hook Extender

Enlarging Flywheel Speed: rear derailleur hanger amplifies the speed of the cassette for smoother changes, a great accessory for cyclists. Improve Climbing Ability: Bike tail hook extension extender can relieve the spring tension of the rear derailleur and improve the climbing ability of the bike. Aluminum Alloy Material: Bike rear derailleur hanger is made of aluminum alloy material, CNC machining, and easy to install. Item Type: Flywheel Extension Tail Hook Material: Aluminum Alloy Weight: Approx. 19g Celsius 0.7oz Specifications: As shown in the measured data, the screws equipped with the extender need to be installed with a 6mm wrench Application: Most tail hooks are compatible, but some tail hooks need to be modified by yourself!