ET vs Backspacing!

Ohhh....So that's what ET means...

And I thought he was trying to phone home. lol

71swing - that's a pretty nifty chart you have there. Thanks! By any chance do you have a higher resolution copy of that? That's pretty useful!

I sort of never understood why a 0 offset on an 8 inch width wheel would give a 4.5 inch backspacing. This offset reffers to the plane that sits up against the wheel hub/drum/rotor/whatever right?

If it's smack dab in the middle of the wheel, wouldn't it be 4 inches from the center line either way (fore and aft)?