1.Reduces friction noise: The chain stabilizer for the rear derailleur features a guide wheel with a size of 10T made of nylon fiber. This design effectively minimizes the friction noise between the chain and guide wheel, ensuring a smoother riding experience. 2.CompatibilityCompatible with various models, primarily determined by the frame hook. Please refer to the image for accurate compatibility information. Supports 3in1 outer, 3in2 outer, and 3in3 outer 3speed configurations, ing versatility for different setups. 3.Material: Made of engineering plastic, the chain tensioner is lightweight yet durable. It provides reliable performance and longlasting durability, enabling a worry riding experience. 4.Easy installation: With its userfriendly design, the installation of the chain tensioner is simple and hassle. Enjoy quick and convenient adjustments to optimize your bike's performance.