How to Measure a Spring Axle – Step by Step Guide With Video

Jul 19, 2022 | How To, Measuring, Spring Axles, Trailer Axles

The following guide covers How to Measure a Spring Axle.

Spring axles are one of the most popular types of axles when it comes to hauling trailers.


How to Measure a Spring Axle

In this video, you will learn how to get the hub face measurements, how to measure the spring to center, how to figure out the weight carrying capacity, and how to measure the bolt circle for your trailer spring axle.


How to Measure a Spring Axle – Video Notes

What you’ll need: 2 straight edges, a tape measure

Remove tires:

First, you will need to remove both of the tires to expose the hub face.


How to Measure a Spring Axle – Other Measurements

How to get the weight-carrying Capacity:

You’ll want to figure out the weight-carrying capacity of your axle. To get this, you’ll need the diameter of the tube along with the outer bearing number. With this information, you can refer to the chart on our website that will tell you the weight-carrying capacity of your axle.


How to measure the Hub Face Measurement:

Measuring the overall width of the axle is referred to as the hub face measurement.  A common mistake when measuring spring axles is to place the tape measure on the outside of the drum. THIS IS NOT HUB FACE!  To get an accurate hub face measurement, place a straight edge against that flat surface where the wheel attaches to the drum and place your tape measure to the inside of the flat edge. Pull the tape measure across the axle, place your second straight edge against the flat surface of the other hub and that will be the hub face measurement.


How to measure the spring center:

Place your tape measure on the outside of one leaf spring and measure to the inside of the other leaf spring.


How to measure the bolt circle:

The bolt circle is the space between the bolts.  If you have a 4, 6, or 8 bolt circle, you can measure from the center of one bolt circle to the center of the bolt circle that is directly across. If you have a 5 bolt circle, this measurement is found by measuring from the outside of one bolt circle, skipping one, and measuring to the center of the next stud or bolt circle.


Bent or Broken Axle?

If for any reason your axle is bent, broken, or missing a hub, contact us today at 515-608-8040 and we’ll walk you through how to measure it.


Ready to Order Spring Axles?

Now that you have measured all the parts of your spring axle you’re ready to buy. Order a new torsion trailer axle today. Once the order is placed, our team is going to jump to get you back on the road!