How to measure wheel rim width

Written by jeffrey brian airman
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How to measure wheel rim width
Rim width cannot be accurately measured with the tyre in place. (Man_With_No_Name/iStock/Getty Images)

You can accurately measure wheel rim and overall rim width by starting and stopping the measurements in the right place each time. When replacing rims or tyres, it is important to know what size rim you have. Wheel rim width is taken two different ways to fully describe the dimensions of the inside and outside edges.

Skill level:
Easy

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Things you need

  • Towel
  • Tape measure

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Instructions

  1. 1

    Set the empty rim up vertically on a soft towel on a flat surface and in a well-lit area.

  2. 2

    Measure the rim from the inner edge of one lip, where the sidewall of the tyre would rest, straight across to the inner edge of the other lip. The distance between these two inner edges is simply called the rim width, as it does not include the thickness of the rim lips.

  3. 3

    Take a second measurement from the outer edge of one rim lip, where the sidewall of the tyre would rest, straight across to the outer edge of the other lip. The distance from the two outer edges is known as the overall rim width.

Tips and warnings

  • Check the owner's manual for the specific vehicle you are using to find out rim size compatibility.
  • Wheel trims -- also known as hub caps -- are usually sold in the same sizes as the tyres/wheels they fit.

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