I put 235/75/ 15 BFG AT's on my 02 tracker and it is fine. Those are a 29" tire on factory rims. You will see cruising the Suzuki forums that 235/75 is one of the most common sizes to upsize to at stock or 2.5" lift. Can also run 30x 9.5 or if you want to go big 2.5 lift and 2" body with minor...