Understanding Vehicle Weights

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Understanding Vehicle Weights

Understanding Vehicle Weights

 

 

Is your 4X4 Overloaded?

 

Okay, first things first. Understand your weights and your terms: Tare, Kerb, GVM and GCM. One of the tricky things in understanding all of these terms is that they do vary slightly from different manufacturers. With that said, here is the simplest way:

 

 


 

Tare Weight: is your vehicle as it rolled off the showroom floor, full of fluids and ten litres of fuel. Sometimes it includes a 75kg driver, sometimes it doesn’t.

 

Kerb Weight: This is your real-world weight, as if it’s parked on the kerb and ready to drive. This includes accessories and other inclusions, plus a full tank of fuel. Want to know your kerb weight? Then get yourself to a weighbridge.

 

GVM (Gross Vehicle Mass): This is the most the vehicle is allowed to weigh overall, under any circumstances. This includes everything, so minus your kerb weight from your GVM to find out your payloads.

 

GCM (Gross Combination Mass): This is an important one if you’re towing. Aside from the GVM and trailer ATM (Aggregate Trailer Mass), GCM sits atop it all.

 


 

 

What’s important to note here is that in real life your maximum towing capacity and your GVM don’t add up to your GCM. In other words, you often can’t max out both at the same time. There are other considerations such as ball weight - the amount of weight your trailer or caravan is carried by the towing vehicle.

 

 

Let’s look at two examples, Toyota 150 Series Prado and 200 Series LandCruiser :

 

 

 

LandCruiser 200 GXL

Prado 150 GXL

Tare Weight

2,630kg

2,235kg

Kerb Weight

2,740kg

2,315kg

GVM

3,300kg

3,000kg

Payload

560kg

685kg

Braked Towing Capacity

3,500kg

2,500kg

GCM

6,800kg

5,500kg

 

 

 

So, is your payload always going to be enough? If you’re dawdling around town with a couple of passengers, you’ll be fine. But if you’re going to fit some common modifications and tow some decent loads, then you might run into trouble.

 

 

 

Think about your passengers

 

Now, don’t go putting everyone on the scales before stepping into the car. You might lose all of your friends. But, this point is worth thinking about. Think about travelling with five adults, which could easily account for up to 500kg of mass. Throw in a few accessories, and you could be teetering on the edge…

 

 

 

 

Think about your accessories

 

Everyone wants the tricked-out touring rig that has all of the bells and whistles, but don’t forget they all add kilos.

 

Your biggest culprits are obviously barwork: bullbars, roof racks and other bolt-on steel all add significant weight. Drawers, fridges and slides are also big ones, plus things like recovery gear, compressors and tools that live in your car full-time. Don’t forget, everything adds up.

 

On top of this, there are plenty of hidden weights you’ll probably overlook. If you’ve fitted tyres with a light-truck construction, that’s good news. They’re stronger and more puncture-resistant, but they will also weigh a bit more. So will fade-resistant heavy-duty aftermarket springs and shocks.

 

Our best advice is to take your 4X4 over a weighbridge, to really know what your 4WD weighs.

 

 

Some examples of typical weights of accessories include:

 

 

ALLOY BULLBAR 35KG STEEL BULLBAR 75KG
WINCH 45KG DUAL BATTERY 25KG
SPOTLIGHTS 5KG TOWBAR 25KG
ROOFCAGE ALLOY 20KG ROOFCAGE STEEL 50KG
EXTRA FUEL TANK 100KG SPARE WHEEL CARRIER 45KG
REAR DRAWS 100 KG WATER TANK 100LTR
ALUMINIUM TRAY 150KG STEEL TRAY 400KG
DOG CAGE 40KG LPG TANK 100KG FULL
ROOF TOP TENT 60KG 50L FRIDGE 30KG
TOOL BOX X 1 100KG LUGGAGE 100-300KG
TOWING 100-300KG PASSENGERS

 

 

 

What can you do to fix the problem?

 

If you’ve a 4X4 that’s well set up for touring and off-roading, one of the best and easiest ways to keep your 4X4 safe and legal is to fit a GVM upgrade

 

This can often give you an extra 500 kilograms on your GVM, which means you can haul and tow lots more legally

 

They often consist of replacement springs and shocks for your 4X4. But most importantly, the upgrades are engineered to suit the increased payload, and come with a certificate of compliance

 

 


 

 

Our GVM upgrade partner - Lovells Springs - holds Compliance Plate Approvals as a Second Stage Manufacturer (SSM) of GVM upgrades for several makes of vehicle including:

 

  • Toyota 
  • Nissan 
  • Ford 
  • Isuzu 
  • Mazda

 

They are steadily expanding the range of vehicles for which they offer this upgrade.

 

But a comprensive vehicle list can be found in our Lovell Spring promotional page, take a look at it here

 

Gvm Lovells Springs logo

 

 

 

 


 

All Four x 4 Spares has been assessed by the SSM and we have been registered with the Federal Department of Transport and Regional Services as a Production Facility.

 

This allows us to supplyfitobtain engineering approval and submit paperwork to the relevant agencies to have your vehicles GVM officially increased. 

 

Do you think your vehicle needs a GVM Suspension Upgrade and you would like to speak to one of our suspension specialists? No worries, you can reach us in different ways:

 

CALL US on: 02 4041 4080  

or 

EMAIL US at: offroad@allfourx4.com.au

 

 


 

 

 

 

A Video is worth a Million Words...

 

Watch the videos below on Lovells GVM upgrades we have fitted:

 

 

 

 

 


 

 

Want to know more?

 

Read our blog GVM / BTC Upgrades - what are they and why are they important? to get a deeper understanding of the topic

 

If you are ready to make a Booking, you can contact us at one of the methods listed above or simply GET A QUOTE HERE and we'll get back to you within 4 business hours

 

 


 

 

 


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