I always wear my rear tires out first. After a week I'm sure I'm off by 20%. Ran my 2009 xdrive hard to 120k miles. Never a problem. (They were staggered too)
Just don't run different tires.
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Current: 2021 M340i xDrive
Previous: '18 340i xDrive; '15 335 xDrive; '14 435i xDrive; '09 335 E92 xDrive
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