you could always shorten your axel, some wheels have a maximum backspacing. My Centerline wheels were custom ordered with a maximum backspacing of 5.5" and that still wasn't enough for the back. The term backspacing is the distance from the edge of the wheel to the mounting face




Offset is a little harder to understand, to get the offset of a wheel first find the centerline, and the offset is the distance from the mounting face to the centerline of the wheel. It's almost always expressed in milimeters, and either positive or negative. If the wheel has a positive offset that means that the mounting face is in front of the centerline relative to the face of the wheel, If the wheel has a negative offset that means the mounting face is behind the centerline relative to the face of the wheel. Found some diagrams hope this helps man.



Rob

Also if you need to convert offset to back spacing simply divide the wheel width in half, and add the offset whether it be negative or postitive. Ex say the offset is -35mm on an 8" wide wheel.

8"/2 = 4 + the offset (-35mm)

= 4 + (-35mm) and [35mm = 1.379"]

=4" - 1.379"

= 3.621" backspacing