I am running 275 60 15 on rear of our Challenger. Stock Dana stock rally's. Tires sit just inside of fender lips. Stance is great with 235 60's on front. 8 1/2 inch rim, I don't know if 275's will be ok even with narrower rear end, but suspect they might. Find a good tire retailer to let you experiment. I have such a local store that will.