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I run staggered on all of my bmw's 17 I have in production right now will be number 5 and my rears always wear first. x-drive or rear wheel drive. Continental DW I just pulled off my 19's were 8/32 front 4/32 rear. That is with my wife driving it not me. My X3 when I switched to my winters was just at 7/32 front 5/32 rear running Pirelli non run flat 19's staggered. I have never had issue with x-drive but I use calculator on e90 forum and try to stay under 1%. I will be running 235-35, 275-30 or maybe 245-35 275-30 20 on my new one. Waiting on new PS4S in March and HRE whenever custom power coating is done.
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