Saturday, April 9, 2016

How to Determine Wheel Offset

A wheel's offset is the difference between two of its measurements: the centerline and the back spacing. The centerline equals exactly half of the wheel's width. The back spacing is the space between the wheel's inner flange and the surface of the wheel that mounts on the hub. Depending on how far the mounting surface is from the centerline, the wheel's offset can be positive or negative. If the hub-mounting surface lies exactly on the centerline, the wheel has no offset at all.

Instructions

    1

    Measure the wheel's overall width, in inches.

    2

    Divide this width by 2. If the wheel has a width of 8 inches: 8 / 2 = 4 inches.

    3

    Measure the length between the wheel's inboard flange and its hub-mounting surface.

    4

    Subtract from your answer the answer from Step 2. If the inboard flange is 5 inches from the hub-mounting surface: 4 - 5 = -1 inch.

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