I'm running 215/75-15 Yokohama Geolanders on Audi/Ronal R8 alloys with ET 45
offsets. Using 8 mm spacers, front and rear, they clear but with mm to spare.
At this net offset (37 mm), with the 6 inch alloy rim and balancing weights
applied to the inside of the rim clears the tie rod ends and the wheel well
lips by 2 to 3 mm at full deflection. Careful inspection of the tires after
about 400 miles shows no evidence of rubbing. To go larger will require
cutting at the current offset numbers I am using.

Frank Grunthaner