Quote:
Originally Posted by HorsePower
My understanding is that there are absolutely potential issues messing with the tire sizes for the x-drive. Differences in the overall diameter/circumference/revs per mile of the tires - overall differences, differences side to side, and differences front and rear, can all cause issues. I believe there is an official BMW spec as to the max differences - I don't know what that spec is. Those issues aren't unique to Subaru's AWD system.
That is likely a large part of why many people chose to go with the BMW-recommended winter sizes (square 275/35 19, which is the package offered by BMW dealers on the 829M wheels).
If I had an x-drive (I don't), I would personally likely stick with BMW-approved sizes for the duration of the warranty.
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Thanks for the suggestion, I am going to stick with the BMW recommended spec as well. And the 829M's look pretty good and aren't too expensive.