Current is 18x10 Front and rear, 255/55/r18

New set is 20x10 front (275/40/r20) and and 20x11 rear (315/35/r20)

The new set came off of an E70, and are going on my E70, but I don't think I had the "Sport Package" that seems to be what got that rim option.

While I cant 100% guarantee confirm there wont be problems, I can 99% say that it should work absolutely fine. Its E70 to E70 after all. I would imagine no issues with offset, hubs, etc. The tire size you are using is also the same setup as on the 4.6/4.8is from the factory; in other words, the rolling diameters are matched for AWD.

Despite staggered tires being different sizes the idea is that both front and rear diameter of said tires, remains equal (or as close as possible to being so). The xDrive transfer case is even designed to adjust its internal clutch slip for minor variations. To clarify: tire diameter does not matter. It just must be the same diameter front and rear, and fit inside your wheel wells, preferably without scrubbing. 275 40 20 and 315 35 20 are both approximately 729mm in diameter (equal).

There are always many different tire/rim options. Running something that was built for your chassis from the factory, typically is not a scenario where one should be too concerned with fitment. You should have zero problems running your intended setup, IMO.

Thank you!! This is exactly what I was thinking, but just didn't know if the E70 Sport package changed something (hub, differential or some other random part) compared to non-sport. I pick the wheels up today and am pretty excited to see how they look.

Let us know how it goes :)