description:
Made of aluminum alloy, durable, practical and anti-rust
Designed to provide a simple and effective method to tension a single adjustable speed system
Convert any multi-speed bike on each rack to single speed
Suitable for 13-23T gear chain mountain bike; easy to install and easy to use
Conventional pulley floating device can be rotated to achieve perfect chain tension
specific:
Material: aluminum alloy
Length: 90 mm/3.5 inches
