Should all 4 tires be exchanged at the same time in order not to destroy the transfer
I just looked up for somebody this situation and wo xdrive it's apparently ok to have 3% difference as the manual spec allows 285/45-19 and 255/55-19 on as well as 255/55-18 square.
Look in your manual and see what it has for stagger options and find what BMW actually says is ok for front to back difference and use the tire calculator.
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2011 E70 • N55 (me)
2012 E70 • N63 (wife)
Last edited by andrewwynn; 10-08-2018 at 05:54 PM.
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