With a little narrower tire you can go a little taller. 10.5 or 11.5's will allow you to stuff 32's in there with little trimming. I will be puting 33x12.5 15's on mine in a few weeks (just on time for Moab) and will see how much trimming I'll have to do (which I will post before and after pics). I am currently running 31x10.5 16's (on stock rims) with plenty of room.