High-quality material: The mountain bike fork speed extender is made of high-quality aluminum alloy, which is strong and corrosion-resistant, ensuring long-term use.

Robust and durable: The rear derailleur is made of aluminum alloy, weighs 12 grams, has a total length of 44 mm and a thickness of 11.5 mm. It is easy to carry. The bicycle frame rear hook extender uses refined surface treatments for a perfect appearance. The surface is anodized, corrosion-resistant and rust-proof, ensuring long-term use.

Easy to install: Installing the mountain bike speed extender is very easy; just replace the screw that attaches the rear derailleur to the bicycle frame.

Simple and practical, saving time and effort.

Ideal accessory: The rear derailleur adapter allows for smoother shifts and is an excellent accessory for cyclists.

Wide range of applications: The rear derailleur extension is suitable for 40T/42T/46T/50T mountain bike chainrings or 32T/36T road chainrings, making chainring expansion smoother.