Adopting the design of long leg deflector, so this bike rear derailleur has strong compatibility. Design of high-quality guide wheel make it smooth and noiseless to operate.Installing this bike rear derailleur through direct mounting, it is easy and convenient to install, and with the premium material adopted, this bike rear derailleur has high rigidity and can gear precisely.Plastic and steel are the materials used to make this front derailleur, which is exquisite and durable.15cm is the length of this front derailleur, 6.7cm is the width and 5.5cm is the height of it.Gear change range total value of 7/8/9-speed is 45-teeth, of 10-speed is 45-teeth and of 11-speed is 53-teeth.Item Name: Rear DerailleurMaterial: Plastic,Steel 7/8/9-speed, 10-speed and 11-speedFeatures: Strong Compatibility, Precise Gearing, Anti-abrasionSize Details: 15cm x 6.7cm x 5.5cm/5.91" x 2.64" x 2.17" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Rear Derailleur