Hey Peavey... if you don't start searching someone's gonna yell at you... but I'll answer your question first... assuming you have 15 inch wheels, the 265\70\15 should be the largest with no trimming... you should be able to go to a 31x10.5x15 with MINIMAL trimming... hope this helps, and start using the search funtion! Welcome to XOC... p.s. this is probably the worst question you could ever ask on this board...