I kept the old bigfoot kit off the Foreman and put them on the Grizzly. They are the ITP C5 rims with the 26inch Mudlite tires. The rear rims actually stick out about 3 inches on each side due to the offset of the rear wheels. Since they came off a straight axle swingarm atv the rear are offset to the outside. On the IRS they are suppose to be the same as the front. I may find someone to trade rear wheels, if not, it doesnt matter except its a little wide trying to get through tight spots and trees. The extra width really makes it feel secure on off-camber slopes though.