Not necessarily. Depending on your wheel offset, you can run a 305 (I do: 305/70/17) and up to a 315/70/17 with a 3" lift. You may have to chop the body mounts, and get aftermarket UCA's.i guess i'll just get the 17x9 from tire rack ...i think 285 70 17 is the biggest i can go with a 3 inch lift right?