on those rims..you can run 275 all the way up to 305 on all 4's including the back.......i know my one guy who had his x5m he ran 295's on all 4's....just a thought.....

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Past
2000 E46 325i
2006 E53 4.4i Sport
2006 X5 4.8is
2011 E90 328xi
2011 E71 50i Fully Loaded :thumb up:
Current
2000 E39 528i
2013 F10 M5
2013 F10 535xi
2017 X3
2017 Sedona
2017 Optima
2016 Fiesta