Road bike chain guide made of nylon for a lightweight, durable, long-lasting solution. - High quality material: Nylon construction offers lightweight design with fine workmanship, ensuring durability and longevity. - Practical application: A useful bicycle accessory to improve your bike. Simple and stylish, it fits bikes of different colours. - Effective function: Helps prevent chain dropping and chain crack, designed for one-piece sprockets. Installation requires disassembly of the bottom bracket and cranks. - Compatibility note: Applies to threaded BB bottom brackets; press-in type is not supported. - Why it helps: Reduces the risk of chain mishaps during rides, enhancing drivetrain reliability without adding bulk. - Use scenarios: - On roads with rough surfaces or fast shifts to prevent chain drop during aggressive riding. - On bikes with one-piece sprockets to improve chain retention during climbs. - As an upgrade on older bikes to boost drivetrain reliability and performance.