Description: 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 Derailleur Material: Plastic-Steel Specifications: 7/8/9-speed-10-speed and 11-speed Features: Strong Compatibility-Precise Gearing-Anti-abrasion Size 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