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Old 08-05-2014, 01:13 AM   #1
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Rim size

What is the smallest and largest tire size the can go on a 15.8 rim?

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Old 08-05-2014, 12:06 PM   #2
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I believe you are asking about a 15X8 wheel instead of a 15.8 wheel.

A stock tire for a YJ is a 215/75R/15, so that would be the smallest tire you should put on that wheel,

And the largest tire that I would run on it would be a 35/12.50/15. The height doesn't matter. if you could find a 44" mudder that was only 12.50 wide then it would fit. But most 44" mudders are 17" wide.

That being said. the width is what you want to stay in the guidelines with. A 12.50 wide tire is the limit on an 8" wide wheel. Anything wider would require a wider wheel.

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Old 08-06-2014, 12:54 AM   #3
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Yeah sorry, 15x8. I have a 15x7 now but want to go a little bigger but not exceed a 33. Would I need to run a15x8 or 15 x7'good enough?
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Old 08-06-2014, 11:16 AM   #4
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Depends on which 33" tire you choose. Most 33's are 12.50 wide and that would require an 8" rim. But there are a few 33's out there that are only 10.50 wide and you could run them on a 7" wheel.

The 12.50 will fit on a 7" wheel, but you get a balloon effect on the sidewall, and that isn't a good thing when it comes to off-roading, because the sidewall comes into contact with too many things that can injure it when it's ballooned out on a narrow rim.

That and with a stock Jeep wheel and a 12.50 wide tire, the tire is going to rub the leaf springs severely when you turn. Doesn't matter if you have 10" of lift, its because of the backspacing on the wheel.

The correct wheel for a 33X12.50X15 would be a 15X8 with a 3.75" backspacing.
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