small wheels and tires 400-8 1,natural rubber 2,thicken tire and tube 3,all kinds for choose, from 6"to18" 4,fast delivery ... small wheels and tires 400-8 Detailed specification ... .50-7, 3.00-8, 4.00-6, 3.25-8, 4.50-8, 4.00-8. 3.50-6, 6.50-8, 5.00-6 and so on4 ...