Butyl & Natural Rubber motorcycle tube, sizes: 350-8, 275-21, 400-19, 375-19, 325-19, 225-19, 200-19, 350-18, 325-18, 300-18, 275-18, 300-17, 275-17, 250-17, 225-17, 200-17, 185-17, 350-16, 325-16, 275-16, 250-16, 225-16, 275-14, 225-14, 300-12, 350-10, 300-10, 275-10, 400-8, 350-8, 300-8, 90/90-18, 250-18, 70/90-17, 60/100-17, etc.