Quote:
Originally Posted by ndinh
For xdrive, you want the OD of your wheel+tire to be closer to 1% between front vs rear (RWD should be within 3%). So basically, 245/35+285/30 or 255/35+295/30 would be your best choice. Math:
Front: 245 * 35 = 85.75mm > convert to in = 3.38"
Tot OD front = 3.38 * 2 + 20(size of wheel) = 26.76"
Rear: 285 * 30 = 85.5mm = 3.37"
Tot OD rear = 6.74 * 2 + 20 = 26.74"
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He's asked the same question and gotten the same responses in multiple threads now.