yes the rear wheels on the E71 are the same hub as E53 (72.56 mm), but front X6 wheels have same hub as E70 (74.1)

Those E70 wheels for sale have 74.1 hub, so with hub rings all 4 would fit an E53.

__________________
2018 Ram 2500 6.7L Cummins 68RFE
19k miles -Bright White/Black - Big Horn Sport - Crew Cab Short Bed
2013 X5 35D (CEO's) - Born on 5/17/2013 -
82k miles - Alpine White/Cinnamon Brown/Premium Pkg, Sport Activity/Premium Pkg and Sound/20" Style 214/Running Boards