Understanding Wheel Terminology

The following is a list of defined terms which need to be understood before aftermarket wheels can be intelligently purchased.

RIM WIDTH - The distance between bead mounts (where the tire attaches to the rim)

CENTERLINE - Half of the rim width (center)

OFFSET - The distance from the centerline to the hub mount pad (where the wheel attaches to the hub)

POSITIVE OFFSET - Centerline is outside of hub mounting pad (increases vehicle track)

NEGATIVE OFFSET - Centerline is inside of hub mounting pad (decreases vehicle track)
Note: Using wheels with greater negative offset than stock can increase strain on wheel bearings and spindles. Inspect more frequently. Be sure to check clearance with frame and inner fender UNDER CORNERING SITUATIONS!

REAR SPACING / REAR BACKSPACING / BACKSPACING The distance from the inner edge of the wheel to the hub mount pad
Note: Sometimes the distance from the outer edge of the wheel to the hub mount pad is referred erroneously to as offset. BE CAREFUL!