Ceramic Bearing Aluminum Alloy Bike Rear Derailleur Pulley Wheel (Black)

Adopting quality aluminum alloy, this product is to use. Ceramic material can reduce drag force which can improve cycling efficiency.

and negative tooth wheel, no strange vioce and speed. Features: Adopting quality aluminum alloy, this product is to use. Ceramic material can reduce drag force which can improve cycling efficiency.

and negative tooth wheel, no strange vioce and speed.

compatibility with flexible rotation. Suitable for use 4 Celsius 5 Celsius 6 mm wheel screws. Specifications: Item: Rear Wheel Material: Aluminum Alloy + Ceramic Colour: Black, Red, Blue, Golden (Optional) Support for  7 Celsius 8 Celsius 9 Celsius10 speed bike Diametre: 5 cm Celsius 2.0 inch Weight: 15 g Teeth: 12 Package Included: 1 * Rear Wheel 2 * Installation Hole Adapters