This example rim is stock Toyota, which I bought by mistake, thinking I could use it for wider tires on my Mitsubishi. This wheel has too much backspace, meaning the wider tire would likely rub on my suspension.
This rim is 7" wide, and is being measured correctly across the bead seat.
The same 7" wide rim, being measured incorrectly.
Place the rim FACE-DOWN, so the mounting surface is showing...
then place a straight-edge, like this jack, across the rim, and measure down to the mounting surface.
a close-up, showing that this rim has 4 5/8" (4.625") backspace.
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