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Ok, so I’m looking at changing my front setup out to a wider footprint. I’m toying with my rear setup on the front to see what would look right to me.
So I’m going from my 18x10.5 (+40 offset) wheels with 275/35r18 tires in the front, to 19x12’s (+79 offset) with 325/30r19. Using same 3 inch spacers. Now, this setup looks damn near perfect to me from a side profile. The previous setup looked way too “in” the fender well. Here’s my confusion, using a wheel offset comparison calculator, it’s showing the 19x12’s should be sitting more than a half inch further inside the fender well.
what am I missing here? The math just defies what I’m seeing.
Using 3" spacers:
18x10.5" wheels, +40 mm offset = 4.32" backspace (7.18" from the stock hub flange to the outside of the wheel, plus the tire bulge).
19x12"wheels, +79mm offset = 6.61" backspace (6.39" from the stock hub flange to the outside of the wheel, plus the tire bulge).
So the diagram is correct. Your new wheel sits almost an inch further inboard at the outside, and 2 1/2" further inboard on the inside.
Wheel offset confusion
