Those are tire sizes not offsets. Use the stock sizes or use 225/35 and 255/30. My rear stock runflats are pretty toast at 10k miles. 20k is impressive.
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2020 X3MC
2009 135i: AW/CR Aluminum Trim, 6 speed, M-Sport, Premium, Heated Seats, Ipod, BMW Performance Pedals, BMW Performance SSK, BMW Performance Exhaust, BMW Performance Grills E93 M3 FSB
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