... . The main series are following as:1,Big tubeless series6.00*17.5, 6.75*17.5, 7.5*19.5 ... middle-sized truck2, Heavy-sized truck series7.50-20, 8.00-20, 8.50-20, Used for heavy-duty truck3, Farming ... &engineering series7.50-20, 8.00-20, 8.50-20, 8.50-24 Used for farming4 ... ,Mid-sized truck series 6.00-16, 5,Mini_truck series 5.5-16, 6.0-16 ...