Rim Bolt Pattern

Question:

  • How do I measure the "bolt pattern" of my quad's wheels? {Wayne, WI, Honda 350 Rancher ES}

  • Answer:

    ATV or quad rim bolt patterns are written as number of bolts/distance apart in mm. So catalogs will show 3/110 or 4/110.

    Many people seem to have trouble measuring bolt pattern spacing so often that there are plastic spacing templates available now. You hold the template up to the bolt pattern and when the holes in the template match the holes in the rim, or the studs on your hub, you note the number on the template.

    The bolt pattern spacing can also be measured with a regular tape measure. You have 4 lug (bolt) rims on your machine, but I will show 3 and 5 bolt rims also.

    4 Bolt Rim


    quad or atv wheel with 4 bolts

    Measure from the center of one bolt hole (or stud if it is still one the bike) across the axle hole to the center of the bolt hole on the other side. You need this number in millimeters (mm). If your tape measure does not have millimeters on it, get the number in inches and multiply it by 25.4.

    For example if the tape measure reads 5 1/2" convert this to a decimal or 5.5 and multiply it by 25.4. 5.5x25.4=139.7. Round this number to 140. So your rim bolt pattern size is 4/140.




    3 Bolt Rim


    3 lug atv wheel or quad rim

    To measure a 3 bolt, or lug, wheel you need to imagine a circle that passes thru the center of all three bolts. Since the bolts are not opposite each other, you can not just measure across. You can draw a circle on a clear piece of plastic or cut one from paper, whatever you need to do.

    If you measure 5 3/8" convert to a decimal, which is 5.375 and multiply by 25.4. The result is 136.525. Round this number up and your bolt pattern is 3/137.

    5 Bolt Rim


    5 bolt atv rim or quad wheel



    To measure the rim bolt pattern on a wheel with 5 bolt holes, hold the tape measure on the edge of a bolt hole and measure across to the center of the 2nd hole. The diagram above should make it clear.

    You get a measurement of 6 1/8". In a decimal that's 6.125. Multiplied by 25.4 that equals 155.575. Round up. Your rim bolt pattern is 5/156.


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