Our bicycle sealed bearing pulley is suitable for mountain bike enthusiasts who require dependable components. The wide teeth design offers precise chain control, while the sealed bearings ensure smooth operation and longevity. This guide roller is designed to withstand the rigors of off-road cycling, providing a seamless and enjoyable ride. Features -Color:Black -Material:Plastic -Size:6.00X6.00X1.50cm/2.36X2.36X0.59in -Seamless gear shifting: suitable for 6/7/8 speed derailleurs, ensuring smooth and efficient gear transitions for a better riding experience -Durability and longevity: made from wearresistant materials to extend the product's lifespan and reduce the need for frequent maintenance, suitable for longdistance and rugged rides -Precise chain guidance: designed to minimize chain deviation, protecting the drivetrain and ensuring a secure and stable ride -Lightweight performance: the lightweight construction helps reduce the overall weight of the bike, enhancing speed and handling for various outdoor adventures -Convenient installation: compatible with multiple mountain bike models, allowing for easy adjustments or replacements to meet the unique needs of different riders Package list: 10 x Rear Derailleur Pulley Wheel