Deep-toothed guide wheel reduces chain drop for smooth speed changes. Silky smooth rotation and higher transmission efficiency for labor-saving riding. Our guide wheel is made of high-quality material, durable, rustproof and corrosion resistant. Antioxidant and anodized resistant, reduce friction, increase durability, for prolonged use. The guide wheel with multi-tooth design offers precision in chain engagement, ultra smooth performance and significantly reduced friction. It has good compatibility and can prevent chain jamming. Its mounting shaft is suitable for 4MM, 5MM, and 6mm sizes and is compatible with most bicycles and road bikes. These derailleur pulley set are very easy to install with a wrench by simply removing the screw that holds the pulley to the derailleur. Description: Introducing the bicycle guide wheel, a must-have accessory for all cycling enthusiasts This deep-toothed guide wheel is designed to reduce chain drop, ensuring smooth speed changes and stable winding during your rides. With silky smooth rotation and higher transmission efficiency, this guide wheel makes your cycling experience more labor-saving and enjoyable. The multi-tooth design of this guide wheel enhances safety by minimizing the risk of chain drag, providing you with a worry-free riding experience. It offers good compatibility, preventing chain jams while riding, and its installation shaft is suitable for 4MM, 5MM, and 6MM sizes, making it compatible with most bicycles and road bikes. Upgrade your bike with the bicycle guide wheel today and enjoy a smoother, safer, and more efficient ride every time Item Name: Derailleur Pulley Material: Aluminum Alloy, Metal Features: Rustproof, Corrosion Resistant, Universal Fit Size Details: S, Diameter: 4.3cm/1.69" (Approx.) L, Diameter: 5cm/1.97" (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 Derailleur Pulley