Rear Derailleur Gear Shifter for 6/7 Speed Mountain Bikes – Direct/Hanger Mount
High-Performance Bike Rear Derailleur – Model RD-TZ31-A. This rear derailleur is suitable for various types of bicycles including Perfect for cyclists looking for quality and efficiency! Front Chain Wheel Tooth Difference: Supports a difference of up to 20T for versatile gearing options.