Light Weight Bicycles Tail Hook Extension Frame Rears Gears Hanger Extension Adapters for Road Bicycles Bikes Enduring

Features: Improve bicycles shifting performances, suitable for various vehicle models, easyly to install, and strong durability. Consist of good-strength aluminum alloys component and treated with black oxidation. Rusts resistant and wear-resistant, light weight. Suitable for mountain and road cycling enthusiasts, especially those who require frequent gear changes. Suitable for various cycling environment such as mountain, cycling, long-distances travel.

Specifications: Component: Aluminum Alloy Type: 12x1.0mm/12x1.5mm Color: Black/Red Size: about 38.8x73mm/1.53x2.87inch

Package Includes: 1pc Rear Derailleusr Extenders

note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.