... Good afte-sale service, passed ISO9001, CCC,DOT Motorcycle inner tube:1. Specification for Motorcycle tube 300-17, 300-18, 250-17, 275-17, 275-18 ... , 250-18, 275-21, 350-8, 350-18, 350-10, 300-10, 325 ... -18, 110/90-16, 410-18, 300-8, 90/90-10, 400-12 ... -14, 2.25-17, 325-16, 90/90-18, 350-16, 2.50-10, 300-21, 460-18, 250- ...