Shimano Altus M310 7/8-Speed Rear Derailleur 13/15t Pulley Set Review Posted by GiantPandaisy July 3, 2018 in Drivetrain Components This fits your . Make sure this fits by entering your model number. Shimano Rear Derailleur Pulley Assemblies Shimano Rear Derailleur Pulley Assemblies Cycling Outdoor Recreation Parts & Components SHIMANO Sports & Outdoors