I'm trying to figure out how to run the same size all the way around....and 235 60 15 is as small as I'm willing to go on the rear. I guess I can just run the same height.235 60 15s are too big. I'd rum 15 x 6 on the front, but have run 15 x 7 Rallyes also. I think 215 65 15 is the largest I have run on the front.