Is it normal to have a non-matching wheel for the spare? Im not up on the wheel types yet but the spare is the standard 3.0 17" wheel from 2006. The wheels on the X5 are the standard 18" on the 4.4.

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Current BMW's:
2013 E70 X5 xDrive35i Premium (mine)
2014 F25 X3 xDrive28i (hers)
Past BMW's:
2001 E46 325i
2001 E46 330ci
2003 E39 525i
2006 E53 X5 3.0i
2008 E70 X5 3.0i
2014 E84 X1