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Dear Bob, the next and only size I know of is a 285/35-22" tire(on a 9.5" rim). This keeps your speedo correct and will have no clearance issues. If you go any bigger than the 20" you have now, you will most likely need wider rims(9" or 9.5"). Plus your electronics will get thrown off. Its up to you. I like my 275's, they look right at home. Go play with the tire calculator at the link below. Maybe you'll find something that you can use. Bob