I have a set of 14" wheels setting here waiting for some sort of truck tire. Just haven"t decided on which tire. They are going on my XP4 900 le What is the largest diameter you think I can run without rubbing ? I live in Havasu and we ride hard and on average our rides are 150 to 200 miles round trip . I'm getting about 1500 miles out of my big horns now. would love to do some testing for you.