I just picked up a Grand Cherokee Diesel and wanted to get bigger tires (265/65/17) installed. Also a all-terrain was a must. My question is when putting a tire that is 1" larger in diameter than the originals is it going to affect my speedometer dramatically? Would I have to make any adjustments. The original tires are 245/65/17. I don't have a lift or any other mods at this point. I am going to get through the warranty before any of that. I just can't stand the highway tires they put on it.
Thanks for the help.
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