X6 Wheel on E53

[Skier1]

Originally Posted by X5SND

Mine are 20x10F & 20x11 rear. They sit more or less flush with the fenders without the need for any spacers. You will need hub rings though (how many depends on a couple factors such as style # and whether or not they're reps or the real McCoy)

Also, regarding the 21" wheels, you may need flares from the 4.8is as the tires that you'd normally wrap them suckers in is a 325.

Yes they are genuine BMW wheels style 259. 20" not 21"
I have done some more research and it looks as if I will need the hub rings for the front due to the front hub on the X6 being 74mm and the X5 being 72.5mm. The rears should be ok as the hub sizes are both 72.5mm.
The existing front 168 style are 20 x 9 1/2 with a ET45 whereas the
X6 wheel style 259 are 20 x 10 with a ET40.
The existing rear 168 style are 20 x 10 1/2 with a ET30.
The X6 wheel style 259 is 20 x 11 with a ET37.

So I put all the numbers into a calculator I found on the internet and by it
The fronts will sit out a further 5mm and have the same inner clearance.
The rears outer clearance is the same but will sit in a further 7mm.

So hopefully all will be good without having to fit the outer flares.