Tractor tires are mounted to tractors using lug nuts. Since there are many different sizes of tractors and tires, the quantity and size of lug nuts may vary from tractor to tractor. You will need to use a lug nut wrench to remove the lug nuts. Different kinds of lug nut wrenches exist, but the four-way type being most common. The four-way looks like a cross with a socket on each end of varying size, which gives you the ability to use one wrench on different sized lug nuts.
Slide the correct size lug nut wrench over one of the lug nuts on the tractor. To ensure that it's the correct size, start with the smallest and proceed to try each size until you achieve a secure and snug fit.
Turn the wrench counterclockwise to loosen the lug nut. You may encounter significant resistance at first, especially if the lug nut is corroded.
Unscrew the lug nut by turning it counterclockwise until it is completely free.