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Old 07-05-2013, 11:00 PM
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RAM EM RAM EM is offline
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Join Date: Aug 2012
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Vehicle: 2012 Hemi express quad
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Engine: 2009-20?? 345ci (5.7L) Hemi V8 390hp 407lb/ft
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Originally Posted by BlownGP View Post
Backspacing is measured in inches not mm and is the distance from the back of the rim to the hub mounting surface. Offset is the distance between the hub mounting surface and the center line of the wheel.

Stock offset is 20mm
I know the difference between offset and backspacing, I worked in and managed a tire shop for almost ten years. I just used that terminology inadvertently because that's the way the OP worded it. Thank you for the clarification, however.
And since we are being precise to the last millimeter, the exact offset of the 20" RAM wheel is +19.04 mm, not 20 mm, which is actually an erroneous measurement anyway, since you did not indicate whether it was a positive or negative offset.

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