Quote:
Originally Posted by Nima
Hi:
I am confused about understanding wheels back spacing and offset, even after all these years!
First thing first: Back spacing is the distance between wheel mounting surface to the lip of the wheel on the back side, Offset is the position of the wheel mounting surface in regards to the center of the wheel based on its width. Correct?
Now, this seems to be a simple calculation unless my understanding of the backspacing and offset above is wrong. For example, If a wheel is 8" wide with 4" back spacing, that means the wheel mounting surface is 4" away from wheel rear lip which means the mounting surface is at the mid center of wheel which is 4" which means the offset has to be zero!
So why and how an 8" wide wheel with 4" back spacing can have positive or negative offset? What am I missing?
Thanks
|
Wheels are measured at the bead surface for the tire,... not overall width.
A 8" wheel actually measure 9" overall.
So a zero offset 8" wheel will have a 4.5" backspace.