inner tube 450/500-12 1.Size:12";13";14";15";16"etc 2. ... -18,250-18,350-10,100/90-10,300-8,400-8,400-12 etc.2.Motorcycle inner tube size:185-17 ... -18,110/90-16,275-17,350-18,400-10,400/450-12,500-12,400/450-14,300-10,350-10,350-8 ... ,400-8 etc.3.Passenger car tube sizes:145-10 ...