Wait a minute, I think he's suggesting offset has something to do with what tires he runs. Let's set this straight first, it doesn't matter if you have a +45 or -45 offset, the tire you run is relative to your wheel WIDTH not your offset. an 18x9 is an 18x9 no matter what the offset and the tire will fit on the actual wheel. The only time you need to worry about tire size and offset is when you are determining the wheel width along with those, in case you are trying to stuff something huge under there you might have to run X amount of camber or stretch some tire.
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