^^I believe the rear is different. e.g. BMW has different part#s for style 128 wheels for X5 and X6.

X5 E70 center bore is 74mm on all wheels and X6 front wheel center bore is 74mm and rear wheel is 72.5mm(which is E53 X5 bore size).


X5 style 128
10 x 21 Front - ET 40 - 36 11 6 779 375
11,5 x 21 Rear - ET 42 - 36 11 6 779 376

X6 style 128
10 x 21 Front - ET 40 - 36 11 6 771 425
11,5 x 21 Rear - ET 38 - 36 11 6 782 833