biggest tire size

You can fit a 275/60/15 on 15x8s in there with no problem if ... you use the offset shackle kit. I installed the kit and then had the offset on the 15x8s adjusted 3/4" and it fits perfectly. It is wise to take measurements before doing anything since we all know that Ma Mopar's idea of centering her rear axle housings was not always that centered. ;)