Originally Posted by midsouthduckhunter
8.5" wheel width on a 12.5" tire; a little narrow aincha? Spec calls for 9.5-10.5" You definitely not gonna scrub your wheel on a curb. Concerns?
*** This is a great question, thanks for asking.
Worked for Discount Tire stores, and Direct for many years. Lots of experience here. Recommended, is just that. Doesnt mean you cant go out of spec. The recommended wheel width.. Its an ideal size, for perfect fitment and wear characteristics. And not one size fits all. Going wider tire/skinnier wheel is a very common practice, especially in the big sidewall 4x4 world. You can definitely go outside of spec, to a point. This would be the farthest I would go. Properly aired, my tire has a great footprint. I would have a bigger contact patch, if I had a wider wheel, thats certain...but not much.
At this size, I am not stretching anything too far as far as the bead goes, the sidewall bubble is appropriate, and the wear should be ok as long as I watch it and rotate as scheduled.
Would I put a 315/30-18 corvette tire on a 8.5" wheel....no. Am I ok with a 33x12.50 on a 8.5 wheel, absolutely.