[Lloyd-TX]

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by superdutybob:
Lloyd:

I had a 78 WS6 T/A back in the day and I would swear that the 15"x8" wheel had ZERO offset. Are you sure about the back spacing numbers that you are stating? The 8" portion of the dimension is actually taken at the bead seat area, NOT the total rim width from outside edge to outside edge. I have seen people measure back spacing by laying a straight edge across the backside of the wheel and measure down to the mounting face. Taking that dimension from the listed wheel width would give you an incorrect BS number.

Just want to make sure. <HR></BLOCKQUOTE>

Bob:

Yes, they are ZERO offset. This "backspacing" dimension that everyone uses used to confuse me too! The backspacing IS measured from the rear inner mounting face to the OUTER backside lip of the wheel. This gives a ZERO offset 8" width rim a 4 1/2" backspacing dimension. Apparently, the width of the tire bead lip is exactly 1/2". If one were able to precisely measure from the bead seat to the mounting face, one would get a 4" dimension.

Hope this helps clear it up!