'79 Aspen



front 245/60/15 on 7"/4.25"bs Rallye
rear 275/60/15 0n 8"/4.5"bs Rallye


The rear wheelwell lip would rub the outside sidewall on a big dip. I think if the lips were rolled up they wouldn't rub, but before I could try it, the right front tire blew and I had to go back to my 14" tires.
I had these wheels/tires so I tried them. If I were starting from scratch, I'd go 235/60 on a 7" front, 255/60 on an 8" rear.