Made of high quality material, it is durable and sturdy, the transmission applied to 7 speed, 21 speed mountain bike.
Material: High quality metal
Color: As the picture show
1 x Transmission
Made of high quality metal material, it is durable and sturdy
The transmission for mountain bike 7 speed, 21 speed
Unique guide wheel screw, easy to operate the speed performance
GUARANTEE: If you have any problem with this product, you can just take advantage of our 180 days warranty. We will replace it or give your money back for any reason