'08 X3 Sport 19" Wheel/Tire Size?

I purchased this 08 in March. Ive recently started looking for a winter tire/wheel package. During this process I have found the following issue.

Issue: My X3 has the 19" package which looks to be from the factory as follows:

FRONT: 19*8.5 46mm offset Tire: 235/45-19
Rear: 19*9 51mm...

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