Where are you thinking of getting the forged wheels from @gemmisa?I measured how comfortable I was with a 12mm spacer for purposes of testing how close the factory 275/65/20 tire moved to the fender lining. Results below:
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Based on the spacer test fit, I'm looking at a getting a custom forged wheel set: 20x90+43 which is pushes the entire wheel/tire assembly 11mm outward (almost identical to above). Any more aggressive like a 20mm...I would be afraid munching my fender while driving.