... and natural rubber inner tubes are available. Common quality, superior quality. Sizes: 1.85-17, 2.00-17, 2.25 ... /3.50-17, 3.50-10, 3.50-16, 4.00-8, 4.10-18, 70/90-14, 80 ... -14, 275-14, 300-14, 225-16,250-16, 275-16, 300-16, 325-16, 350-16, 200-17, 225-17, 250-17, ... 17, 300-17, 275-17, 250-17, 350-16, 300-16, 275-14, 325-17,300-12, 400-10, ... /90-17, 60/100-17, 110/90-16, 90/100-16, 110/80-14 90/100-14, 60/100 ...