both 535xi & 550xi have the same wheels (front & rear) and thus same offset.
the 30 offset you are referring to on the 550xi is on a 18 * 8 wheel.
Originally Posted by GABMAN
Would style 351 wheels that are on a 550XI fit on a 535XI? The 535XI have 8.5 x19 ET 35 , I believe the 550XI has an ET of 30 , they should also be 8.5 x19 as I am told they are a square set up. Thanks