Ceramic Bearing 11T Rear Derailleur Pulley Roller Accessory for Mountain Road Bike

Made of quality aluminium alloy material, wear resistant, sturdy and durble. Fine workmanship, make your bike more stylish and cool. Ceramic self-lubricating system, good lubricity. Condition: 100% Brand New Item Type: Rear Derailleur Pulley Material: aluminium alloy Optional Color: red, black Teeth: 11T Diameter: Approx. 41mmCelsius1.6in Weight: Approx. 10g Selection principle: 1. Try to choose the same size as the original wheel. If it is not the same, you can choose a smaller size than the original wheel, and you cannot choose a larger one. 2. The wheel is not distinguished from the tension wheel. Some of the rear derailleur are different in size from the tension wheel and can be replaced. The chain length needs to be adjusted again.