New 21+ Go Kart Rims With Tires. Go kart racing wheels are usually either 5 or 6 in diameter. Rear wheels are generally wider than the front wheels, although that depends on the type of racing you do. Need cheap tires, bmi is place to shop! Go kart wheels in one and two piece, steel and aluminum alloy. Go Kart Rims With Tires - Rupp Dart Vintage Go Kart Rims And Dunlop Bridgestone Slicks Tires Go Kart Rims Go Kart Vintage Go Karts Go kart changing front bearings.