Bnineteenteam 11T Mountain Bike Rear Derailleur Pulley - High Performance Jockey Wheel & Tension Guide Roller for Smooth Shifting | Perfect for Trail Riding, Mountain Biking & Off-Road Cycling

Specification: Item Type: Bicycle Rear Derailleur Pulley Material: Aluminum Alloy Outer Frame + Steel Bearing Application: For Road Bike, Mountain Bike, BMX Suitable For: 4/5/6mm Axis, With Regulating Wheel Screws Weight: Approx. 24 g/0.8 oz Package List: 1 x Tension Wheel 2 x Reduction Sleeve

??Good performance??- Guide wheel support to ensure the disc work stability and durability, reduce deflection, strong support is not easy to deformation

??Well made??- The regulating wheel is equipped with 4 mm/0.16 inch and 5 mm/0.20 inch reduction sleeves, regulating wheel screw

??Great product??- 11T rear guide roller pulley, CNC machining, built in bearing. The edge of the roller wheel is further reduced to increase the contact area between the roller wheel and the air

??Hollow Design??- Hollow edge increases disc friction system helps to quickly remove sediment, rain and increase ride smoothness

??Warranty??- If you have any questions about this product, please feel free to contact us, we will try our best to help you solve your problem