How to measure a sway bar


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HOW TO MEASURE A SWAY BAR

OPTION 1 : MEASURE SWAY BAR WITH MEASURING DEVICE

This is the most accurate and easiest way to measure the sway bar. You can use a digital slide caliper like shown in the photo to measure your sway bar. Try and measure the bushing surface for the most accurate reading, but part of the part next to the bushing surface will also work. This example shows 36.83 mm. Always round to the closes whole number for metric, which would be 37 mm for this example, so you would order 37 mm bushings in this example. You can also use an analog micrometer as well.

OPTION 3 : MEASURE USING A WRENCH

Another easy way to measure your sway bar diameter is to use an open end wrench. Start with an estimated size, and continually swap wrenches until you find a wrench that fits snuggly over the sway bar as shown above. This example shows a 19 mm wrench fitting snuggly, so you would order 19 mm bushings.

OPTION 3 : MEASURE USING TAPE

Another option would be to measure using tape. Taking a piece of masking tape or duct tape, wrap the tape around the sway bar closest to the bushing surface (or the bushing surface), and make sure the tape overlaps itself. Then, taking a razor blade or knife, make a cut through all layers of the tape parallel to the sway bar. Then remove the tape, and place the tap on a flat surface. Using a tape measure or a ruler, measure the length of the tape. Now, if you paid attention in math class, you should know that perimeter length of a circle is ∏ x Diameter. Since we have the perimeter length (4 9/16" in this example), we can divide by ∏ (which is 3.14), and yield the sway bar diameter, which is 1.45". This result can be converted to metric by multiplying it by 25.4, so that makes this sway bar 36.83 mm (round up to 37 mm), which is the same in the 1st option as shown above.

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