Enhance your mountain biking experience with these sturdy rear derailleur guide wheels. Designed for easy installation, they fit seamlessly into your bike's existing setup, allowing for quick and sturdy upgrades. These guide wheels are ideal for riders who demand precision and reliability in their gear shifting, whether tackling steep climbs or navigating technical descents. Features -Color:Black -Material:Plastic,iron -Size:3.80X3.80X1.80cm/1.49X1.49X0.71in -Robust durability: built with robust materials that offer excellent resistance to wear, extending the life of the guide wheel significantly -Versatile fit: compatible with a variety of mountain bike models, this guide wheel offers easy installation and broad usability -Seamless gear shifts: ensures seamless gear shifts, enhancing your riding efficiency and making transitions between gears smooth and effortless -Weight reduction: the lightweight design contributes to the overall reduction of the bike's weight, improving handling and performance -Chain optimization: optimizes the chain's operation to minimize noise and friction, resulting in a quieter and ride Package list: 5pcs x rear derailleur guide wheel