Shimano RD-M8130-SGS Tension and Guide Pulley Set Pulleys will eventually wear down, fortunately we've got Shimano's RD-M8130-SGS Tension and Guide Pulley Set ready to get you back up and shifting again. They're specifically designed for the all-new M8130 rear derailleur and come in packs of two. Being XT level components, you'll get countless miles out of them before having to replace them again. Features Sold in packs of two Compatible with the RD-M8130 rear derailleur XT level components are long-lasting and deliver consistent performance | Shimano | Rd-M8130-Sgs Tension And Guide Pulley Set Sgs Tension And Guide Pulley Set