How to Measure Torsion Axle (A Step-by-Step Guide)

How to Measure Torsion Axle (A Step-by-Step Guide)

Don’t let a worn-out or improperly fitted torsion axle ruin your towing experience. Follow our step-by-step guide to measure Torsion axle accurately and ensure a perfect fit.

With our instructions, you can upgrade your trailer’s suspension and enjoy safer travels on the road. Start measuring your torsion axle today and take the first step towards a smoother ride.

A torsion axle is a crucial component of a trailer’s suspension system, providing a smooth and safe ride for the cargo being transported. 

However, over time, torsion axles can wear out or become damaged, leading to a compromised suspension system and potentially dangerous driving conditions. 

Therefore, it is important to regularly measure torsion axle to ensure it is functioning properly.

In this article, we will provide a step-by-step guide to measuring torsion axles, including the necessary tools, preparation steps, and interpretation of results.

Tools Needed

Before measuring the torsion axle, you will need a few specific tools, including:

  • Measuring tape or ruler
  • Level
  • Jack stands
  • Wrench or socket set
  • Safety glasses


Before measuring the torsion axle, it is important to ensure that the trailer is in a stable and safe position. 

Follow these preparation steps:

  • Park the trailer on a level surface
  • Place wheel chocks on both sides of the trailer’s wheels
  • Use the jack to lift the trailer until the wheels are off the ground
  • Secure the jack stands under the trailer’s frame to hold it in place

Measuring the Torsion Axle

Once the trailer is in a stable and safe position, you can begin measuring the torsion axle. 

Follow these steps:

  • Locate the torsion axle by looking for a square or rectangular tube running between the wheels.
  • Measure the distance between the centre of the torsion axle and the centre of the wheel hub using a measuring tape or ruler. 
  • This measurement is known as the hub-face measurement.
  • Record the hub-face measurement for both wheels.
  • Measure the distance from the ground to the centre of the torsion axle using a level. This measurement is known as the ride height.
  • Record the ride height for both sides of the trailer.

Interpreting the Results

Now that you have Measure Torsion Axle, it is important to interpret the results to determine if the axle is functioning properly. 

Here’s what to look for:

Hub-face measurement: 

The hub-face measurement should be the same on both wheels. 

If the measurements differ by more than 1/8 inch, the torsion axle may be bent or damaged and should be replaced.

Ride height: 

  • The ride height should also be the same on both sides of the trailer. 
  • If one side is higher or lower than the other, the torsion axle may be worn out or damaged and should be replaced.


Measuring the torsion axle is an essential part of trailer maintenance and safety. 

By regularly checking the hub-face measurement and ride height, you can identify potential problems with the torsion axle and address them before they become serious safety issues. 

With the right tools and preparation, measuring the torsion axle can be done quickly and easily.

Additional Resources

For more information on trailer maintenance and repair, check out these helpful resources:

  • Trailer Life magazine
  • Trailer Maintenance and Repair by Bob Henderson
  • The Trailer Handbook by Karen Ruth
  • RV.Net Trailer Maintenance and Repair Forum.


Why is it important to measure torsion axle?

Regularly measuring the torsion axle is important because it helps ensure the trailer’s suspension system is functioning properly. A damaged or worn-out torsion axle can cause uneven wear on the tires, poor handling, and potentially dangerous driving conditions.

What is the difference between the hub-face measurement and the ride height?

The hub-face measurement is the distance between the center of the torsion axle and the center of the wheel hub. This measurement is important because it ensures that the wheels are properly aligned and centered on the torsion axle. The ride height, on the other hand, is the distance from the ground to the center of the torsion axle. This measurement ensures that the trailer is level and that the torsion axle is supporting the weight of the trailer properly.

How often should I measure torsion axle?

It is recommended that you measure torsion axle at least once a year, or more frequently if you frequently tow heavy loads or travel long distances. Additionally, you should inspect the torsion axle for signs of wear or damage, such as cracks or bending, and replace it as necessary. Regular maintenance and inspection can help prevent more costly and dangerous problems down the road.

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