Description: Medium cage rear derailleur allows for silent shifting without wearing the chain, making gear shifting smooth and effortless. Adopting advanced technique principle, the shifter allows for convenient and accurate H/L range, which also simplifies later maintenance. Using high-strength ABS, steel and aluminum materials, the shifter with integrated moulding has long durability. You can use only left shifter for 3 speed or right shifter for 10 speed, or both left and right shifter for 3x10 speed. Supporting handlebar diameter of 31.8/34.9mm, the shifter is compatible with most mountain bikes, road bikes and folding bikes. Item Name: Speed Shifter Material: Steel,Aluminum Alloy,ABS Thumb Shifter: Gear Indicator, 1:1 Actuation Ratio Specifications: A: Left Shifter, B: Right Shifter, C: Front Derailleur, D: Rear Derailleur Rear Derailleur: 43T Capacity, Shadow Rear Derailleur, Medium Cage Derailleur Front Derailleur: Steel Frame, 18T Capacity, Maximum 42T Crankset, Chain Line: 48-51.5mm, Clamping Diameter: 31.8/34.9mm Compatibility: Compatible with Japanese, Taiwan, Chinese Shifter, Not Compatible with American Shifter Features: Ergonomic, Low Friction, Wear-Resisting Size Details: Style A, B Length: 10cm/3.94" (Approx.) Style C Length: 14cm/5.51" (Approx.) Style D Length: 18cm/7.09" (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 Speed Shifter