How to Find Offsets

A wheel's offset describes how it attaches to your vehicle. A wheel with a positive offset is oriented close to the center of the vehicle thanks to the position of the wheel's mounting surface with respect to its centerline. A wheel with a negative offset is the exact opposite: its mounting surface is on the other end of the wheel's centerline, positioning the wheel further from the center of the vehicle.

Instructions

1

Set the wheel on the ground, facing downward.

2

Measure the wheel's total width from the top to the ground. This measurement may be more or less than the width that your manufacturer's specifications state.

3

Divide the width by 2. For instance, if the wheel is 10 inches wide: 10 2 = 5 inches. This is the centerline of the wheel.

4

Measure the length separating the wheel's inboard flange from the mounting surface. Mechanics call this measurement the wheel's backspacing.

5

Subtract the backspacing from the wheel's centerline. For instance, if the wheel has a backspacing of 4.5 inches: 5 - 4.5 = 0.5. This is the wheel's offset, measured in inches.