The 'invisible villain' of towing that could void your insurance.


The towing trap - to weigh or not to weigh? that was the question ...
Myself and several of our friends are caravan owners and love setting off from our home on the NSW Central Coast to explore Australia, but the issue of correct weight has been a hot topic of conversation.
In my opinion, getting your car and caravan professionally weighed is one of the best things you can do for your safety and peace of mind, and the experts agree.
It's not just about the total weight, it's about how that weight is distributed across the axles and the chassis.
We booked Kevin Leonard from Get-A-Weigh, a mobile weighing service to come and assess our set up at home which included our tow vehicle and van.
The trap many caravanners fall into is a common misconception that if your tow ball weight is under the limit, you're good to go, he told us. In reality, there are nine considerations to ensure you have it right.
According to government data by Tourism Research Australia (TRA), Aussie travellers took 15.2 million caravan and camping trips in the year ending 2024.
Caravan and campervan registrations have steadily grown over the last decade, TRA research shows, with more than 901,000 registered as at January 2024 - a 27 per cent increase since 2019.
In New South Wales alone, the penalties for being overweight are more than just a slap on the wrist.
A fine can be a stomach-dropping $469 for each non-compliance and three demerit points to your license per item you have wrong. The reason for this is an overweight vehicle is legally considered "unroadworthy."
If you are found to be significantly over limit, a defect notice can be issued stopping you from driving any further, which could really dampen your road trip. You may have to leave your caravan on the side of the road or call a tow truck to move it to a safe location until the weight issue is fixed.
The other thing to consider (and this is a big one according to Kevin), is if you have an accident and your rig is found to be overweight, your insurer may deny your claim and void your insurance.
Before Kevin weighs our van, we needed to have everything packed as if we were about to head away. This included a full tank of diesel and the water tanks filled. Clothes, food and even the dog were part of the weight check.
As far as the van was concerned we just scaped by. Usually we don't fill our water tanks, so that gives us a little more weight to play with.
Our big issue was our car's rear axle, the invisible villain of towing, Kevin said.
Most people check their total weight, but few realise their car's rear suspension is screaming for help. Despite our tow ball weight being correct for the size of our van, it didn't quite cut the mustard when it came to the car's rear axle.
Kevin suggested a weight distribution hitch (WDH) to bring our set-up to compliance, which we now have. For us, this was the most cost effective solution.
Explore has a dedicated section to all things roadtripping, called Road Trips. To read the latest about advice and exscapes, visit this webpage.
A WDH is a specialised piece of towing equipment designed to level out your vehicle and caravan. When you drop a heavy caravan onto a tow ball, the back of the car sinks and the front rises, Kevin explained.
All that pressure is concentrated directly over the back tyres, therefore reducing steering control and braking effectiveness. The WDH moves weight away from the rear axle and redistributes it across the front axle of the car and back onto the axles of the caravan - making your entire rig setup more balanced.
Fitting a WDH didn't change how much we weighed, it just changed how we carried it (that is, the weight distribution).
The cost for a tow vehicle and caravan check with Get-A-Weigh (www.getaweigh.com.au) starts from $325 and, in my opinion, money very well spent. Kevin was extremely knowledgeable and could answer any questions we threw at him, ensuring we have the safest towing experience possible in the future.
This writer used the Get-A-Weigh service at their own expense
1. GVM (Gross Vehicle Mass)
This is the total weight of your tow vehicle (the car). It includes the car itself, fuel, passengers and accessories
2. GTM (Gross Trailer Mass)
This is the weight of the caravan as it sits on its own wheels while hitched to the car. Basically, it's everything the caravan's axles are carrying.
3. ATM (Aggregate Trailer Mass)
This is the total weight of the caravan when it is not hitched to the car. It is the GTM plus the Tow Ball Weight. This is the maximum weight the caravan can legally weigh according to its compliance plate.
4. TBM (Tow Ball Mass)
This is the weight the front of the caravan exerts on the back of your car. Too light and the van will sway; too heavy and it will lift the car's front wheels off the road.
5. GCM (Gross Combined Mass)
This is the total weight of everything - car, caravan, passengers, and gear. It is the ultimate "scale weight" of your entire setup.
6. Front Axle Load (Vehicle)
This checks that you haven't exceeded the weight limit for the car's front tires and suspension. More importantly, it ensures you haven't lost too much weight from the front (due to a heavy caravan), which can impact steering and braking.
7. Rear Axle Load (Vehicle)
Since the caravan sits on the tow ball, the rear axle takes a massive amount of pressure. This check ensures your car's rear suspension and tires aren't being overloaded.
8. Individual Wheel Loads
A professional will weigh each wheel separately. This identifies if your caravan is unbalanced from side-to-side.
9. Towing Capacity (Verification)
The weigh-master will compare your actual ATM against the rated towing capacity of your vehicle's tow bar and the vehicle itself. Even if your car is under its GCM, you cannot legally tow a trailer that is heavier than what your car is rated for.

I have worked at The Senior for over 30years. In my sixties and much like our readers I love travel and all the good things in life now I am at the perfectly seasoned age.






