What does this diagram show?

It shows a wheel cross-section illustrating how offset is measured: the distance from the wheel's width centerline to the hub mounting surface.

How is wheel width shown in the diagram?

The overall WIDTH is dimensioned across the top of the wheel, and it is split into two equal WIDTH halves on either side of a dashed centerline.

Which side of the wheel is the front in this diagram?

The right side is labeled FRONT (Street Side), meaning the outboard face of the wheel facing the street.

Where is offset measured from?

Offset is measured from the wheel's centerline (half of the total width) to the mounting surface, as indicated by the OFFSET arrow in the diagram.

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Wheel Offset Measurement Diagram - Rim Width, Centerline & Mounting Face

Dimensioned cross-section diagram of a wheel rim labeling width and offset

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Dimensioned wheel cross-section diagram labeling rim width and the offset from the centerline on the street side.

AI caption August 2013 · Photo 68 of 205

This document is a small technical diagram illustrating how wheel offset is measured on an automotive wheel. It shows a cross-section (profile) view of a wheel rim. Across the top, the overall "WIDTH" of the wheel is dimensioned, and a dashed centerline divides that overall width into two equal halves, each also labeled "WIDTH" (i.e., half-widths on either side of the wheel centerline). The "OFFSET" label, shown in large red text with a small arrow dimension, indicates the distance between the wheel's centerline and the hub mounting surface where the wheel bolts to the vehicle. The right side of the diagram is labeled "FRONT (Street Side)," identifying the outboard face of the wheel as drawn. From this diagram a reader can learn the basic definition of wheel offset: it is measured from the centerline of the wheel's width to the mounting pad, with positive offset placing the mounting surface toward the street (outboard) side. The document contains no year, make, model, part numbers, or numeric specifications — it is purely a conceptual/measurement reference. It was uploaded to a 1976 Chevrolet Corvette gallery as part of a set of wheel and tire fitment reference images.

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Frequently asked questions

What does this diagram show?: It shows a wheel cross-section illustrating how offset is measured: the distance from the wheel's width centerline to the hub mounting surface.
How is wheel width shown in the diagram?: The overall WIDTH is dimensioned across the top of the wheel, and it is split into two equal WIDTH halves on either side of a dashed centerline.
Which side of the wheel is the front in this diagram?: The right side is labeled FRONT (Street Side), meaning the outboard face of the wheel facing the street.
Where is offset measured from?: Offset is measured from the wheel's centerline (half of the total width) to the mounting surface, as indicated by the OFFSET arrow in the diagram.