This is what came with the cart. The rear are trailer tires, and the front are from some cheap wagon.

While waiting for parts, we put a string on the throttle, a screwdriver in the shaft for steering, and tried it out. This is what happens to wheels that are not designed for go carts. It's a good thing the cart was crawling at a very low speed when this happened.

These are 18/9.5-8 tires and wheels that are perfect for the rear. The cart came from the factory with 21" tires, but these are what came on later model Dingos, and will actually work better than the larger size.

As seen here, the new meats are a little bigger, and will make this cart a true off road machine.

These are the new 145/70-6 front tires. The wheels are actually designed for go carts and have high quality bearings.

The new tires will give additional front ground clearance, and will grip better in the dirt.