How Mars Weighs Its Caravans – Understanding Tare, ATM and Tow Ball Weight (Video)

How Mars Weighs Its Caravans

How Mars Weighs Its Caravans and Checks the Weights

This article explains how we weigh Mars caravans and what the key weight numbers actually mean for you as the owner. Watch the video below to see the process step by step.

Video: How we weigh a Mars caravan and read the results

Click here to watch the video on YouTube

What You’ll See in the Video

  • How we position the caravan on the scales to get an accurate reading.
  • The difference between tare weight, ATM (Aggregate Trailer Mass) and tow ball download.
  • Why the measured weight can be different to the figure on the compliance plate (factory options, dealer-fitted accessories and any added gear).
  • Why correct caravan weights are critical for safe towing, legal compliance and insurance.

Key Terms Covered

  • Tare Weight – The weight of the caravan as built, without personal cargo, usually with standard equipment only.
  • ATM (Aggregate Trailer Mass) – The maximum allowable weight of the caravan when fully loaded and uncoupled from the tow vehicle.
  • Tow Ball Download – The downward load the caravan places on the tow bar of the tow vehicle when coupled.

The video walks through these terms in plain language so you can see how they relate to what’s on the scales on the day you weigh your van.

Why This Matters for You

Understanding your caravan’s actual weights helps you:

  • Stay within the legal limits of your caravan and tow vehicle.
  • Set up a safer, more stable towing combination.
  • Avoid potential issues with warranty or insurance if something goes wrong.

Still Unsure About Your Weights?

If you’re still not confident about your specific setup after watching the video, please get in touch with us.

When you contact Mars Campers support, it helps to provide:

  • Your van model and VIN.
  • Your tow vehicle make and model.
  • Any scale readings you already have (photos of the display are ideal).

Our team can then talk you through what the numbers mean and help you work towards a safe, compliant towing setup for your Mars caravan.


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