I have a 20x8.5 and 20x9.5 setup and am currently running 225/35/20 in the front and 255/35/20 in the back (these were the tires on the rims when I bought them). What tire sizes should I be running with these rims? What would be the biggest I could run without rubbing?

 

245/35/20 fronts and 275/30/20 rears

 

So I need to change my fronts and my rears are still fine. If I ran 245/35/20 in the front with 255/35/20 in the rear temporarily, would that be an issue?

 

i think 275 is too wide for a 9.5 (just my preference). I'd keep the front the same (225/35) and go 265/30-20 in the rear.