Wheel tool & measuring

[Andy4639]

OK,
This is the way I do it. I think this is correct. If not someone please LMK.
This is a stock wheel so:
The first picture is the back side of the wheel. It measures 3 1/4"



This is the front side and it also measures 3 3/4" so the wheel itself is a neutral off set.



This is my handy dandy wheel tool to tell me what I have as far as bolt pattern. It want fit inside a stock wheel so it's worthless on golf cart wheels.





0-inch offset ~ Backspacing determined by wheel width

Offset ~ The distance from the mounting pad to the centerline of the wheel. Offset can be positive (more backspacing) or negative (less backspacing).

Backspacing ~ The measurement from the mounting pad to the inner edge of the wheel.

(These are definitions supplied by ARE. Other wheel manufacturers may use different points of measurement.)

Let's assume you have a 17x8-inch wheel. Lay the wheel on the ground with the front (street side) facing down. Lay a straight edge across the rear (top) lip and measure from this lip to the mounting flange. If the wheel has "zero" offset, this will measure about 4.5 inches - one half the width of the wheel plus the wheel lip width (approx 0.5") and result in a 4.5-inch backspace. (Again, ARE measures differently. A 17x8 ARE 200S with zero offset has 4.5" of backspacing to the inner edge of the wheel and not to the bead.