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The factory had 2 possible tire sizes:
215/75R15 and 225/75R15

The largest ive seen without any rubbing (also the size i run on mine) are 235/75R15s

USE CAUTION WHEN DEVIATING FROM MAN SUGGESTED TIRE SIZE! I was in the tire business for several years, we saw A LOT of Jeeps come in with the wrong size tires on, and several of them had problems with the transfer case. It seemed that the Grand Cherokee was more prone to those issues, but several standard Cherokee's had the same problems.

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15y ago

What else can I help you with?