MEIJUN Ceramic Bearing Aluminum Alloy Bicycle Bike Rear Derailleur Pulley Guide Wheel

Features: Adopting quality aluminum alloy, this product is durable to use. Ceramic material can reduce drag force which can improve cycling efficiency. Positive and negative tooth guide wheel, no strange vioce and faster speed. Stronger compatibility with flexible rotation. Suitable for use 4 5 6 mm guide wheel screws. Specifications: Item: Rear Guide Wheel Material: Aluminum Alloy + Ceramic Colour: Black, Red, Blue, Golden (Optional) Support for 7 8 9 10 speed bike Diametre: 5 cm 2.0 inch Weight: 15 g Teeth: 12 Package Included: 1 * Rear Guide Wheel 2 * Installation Hole Adapters