?Lixada 1pc 11T/13T Rear Derailleur Guide CNC Aluminum Alloy Pulley Jockey Wheel Disc Sealed Bearings Pulley Replacement

Features: High-tensile steel bearing with rubber dust seal and CNC aluminum alloy wheel. Reduce friction, increase stiffness, enhance durability, for long use. Used on rear derailleur for chain transportation and speed changing. A replaceable 4mm bushing is included. (the 5mm one is configured) Please refer to the size carefully before you buy it. Discounted at only: US$ 4.2