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      05-10-2020, 01:13 PM   #7
Stevek3670
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Drives: M340i
Join Date: Mar 2020
Location: Oakland

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I see, right now the difference in diameter is >2% which is not recommended for X-drive. So i think your safer bet would be to go 235/40 or even 245/35 as these have difference in diameter of 1.4% and 1.1% respectively, much safer choices for the x-drive differential.

Also if you are okay with going square setup then do it so you can also rotate all 4 tires. That’s what I did, and I am running 255/35/19 in all 4.
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