Mountain Bike 11T 13T Aluminum Alloy Rear Derailleur Guide Wheel $ 5.52 Product information: Product name: rear dial guide wheel Material: 7075 high-strength aluminum alloy Specification: suitable for 4/5/6mm axis guide wheel Weight: 11T about 12g, 13T about 14g Selection of guide wheel: Please try to use the same one as the original guide wheel, if there is no one, you can only choose a small one
