Quote:
Originally Posted by Signature Wheel BMW
We recommend 275/30/21 front and 295/30/21 rear. No issues with the transfer case or TC.
You can also run 285/30/21 and 305/30/21.
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If 275 and 295 work, wouldn't 285 and 295 also work fine? It looks like you're saying if you go 285 you should go 305 rear, but I haven't seen one M5 go 305, I think there's an issue with AWD.