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Mountain Bike pulley Bicycle Rear Derailleur
1. Product Name: Mountain Bike pulley Bicycle Rear Derailleur2. Material: alloy + ceramic ball3. color; red, blue, black, yellow4. Specifications: 11T5. Weight: 9g6. Size:Inner diameter: 6mmThickness: 8.4mm7. Product Features:1> high quality white ceramic material, with no oil self-lubricating properties, smooth rotation, no maintenance, high rotation efficiency, riding more effort2> equipped with high-quality aviation aluminum alloy, painting process, colorful, cool style, easy to install, durable, never rust