Features:1. Guide chain tooth groove, high-efficiency speed change. One-piece stamping of high-carbon steel, optimized tooth chain, can better adapt to a variety of harsh environments.2. The gears are locked by the disc nails, and the gears can be disassembled separately; it is convenient to replace and reduce the maintenance cost.3. The aluminum alloy crank adopts an arched structure, which reduces the weight and speeds up more quickly while ensuring the strength.4. Universal 14MM square hole crank competitive chainset, uniform bite force, suitable for most brands.5. Abnormal tooth shape, protrusions, grooves, not easy to drop the chain. Shift pin, precise speed change. Notice:Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. Description:Material: aluminum alloy + high carbon steelApplication: 8/24, 9/27 speedNumber of teeth: 22-32-44 teethWeight: about 810gColor/Style: As the picture shown