I have sent some emails to a popular Australian 4WD magazine that usually has an article on a 4WD vehicle that has undergone the 'usual' add ons. To my calculations the majority of these vehicles easily exceed the GVM. I have not received any responses - probably because of advertising by the accessory companies. As an example of one email:
To the Editor,
I understand the busy schedule and the demands you are obviously under in getting the 'next' great XXXXX magazine out. However, I did not get any response to my previous email, particularly if my assessment was incorrect.
Maybe you have concerns with my comments and any potential impact regarding advertisers and/or sponsors. ARB certainly do as they (Branch Manager in XXXX) refuse to supply any weight data for my query and provide a lame excuse of "As there are quite a few variables when installing accessories & modifying motor vehicles it is extremely difficult to quote weights. Bull bars, kits, side rails & rear bars etc. get improved, modified, superseded quite regularly." For an internationally recognised engineering company that must have their products ADR compliant I find it totally implausible that they do not know the weights of their major components.
However, I still believe there is a positive and educational technical article that could be written in XXXXX to outline the definitions and impacts on kerb weight, Gross Vehicle Mass and Gross Combination Mass through the addition of various modifications and after market accessories. Also, your readers could also be informed of the registration, insurance, structural and legal impacts of driving vehicles above specification weights. And finally, what needs to be undertaken in getting an engineering certification to increase GVM to remain legal.
As another example, in the XXXX mag, there is an article that details a custom Toyota FJ Cruiser.
Looking on the Toyota website we see the weight specs for the FJ Cruiser as the following:
Kerb weight (kg, Toyota has confirmed with me that this does not include fuel) 2000
Gross Vehicle Mass (kg) 2510
Gross Combination Mass (kg) 4760
Gross Trailer weight braked (kg) 2250
Gross Trailer weight unbraked (kg) 750
Toyota also states that GVM is the total permissible combined weight of the vehicle, including occupants, fuel and cargo. Thus, for the FJ Cruiser payload would equal GVM minus Kerb Weight (2510-2000kg) which equates to 510kg.
Looking at the modifications done to the FJ in the article (the range of mods being fairly typical for a lot of 4WD owners) the following can be concluded:
ARB Deluxe winch bar 35kg nett (18kg of OEM gear is taken off the FJ before fitment)
Rock sliders 30kg
Rear steel bar 15kg nett
Warn XD9000 winch 40kg
Drifta Storage drawers 25kg
80 ltr Engel fridge 35kg
ARB Full recovery kit 10kg
Maxtrax (4kg each) 8kg
Shovel and hilift jack 15kg
Full length roof rack (Alloy 25kg, steel 45kg) 25kg
160 Ah auxiliary battery 25kg
2 ARB Awnings 20kg
The above list totals 283kg and some of the weights I have erred on the light side, eg roof rack.
Now add the weights of:
Above modifications 283kg
159 litres of ULP (0.74 kg/lt) 117kg
2 people @ 70kg each 140kg
We now have 540 kg, which is already 30kg above the payload for the FJ Cruiser, and we have yet to add water, food, camping gear, clothes, first aid kit, suspension, tools, wheel/tyre upgrades, the sum of other smaller mods like driving lights and wiring, compressors etc and we surpass the payload even more. Also if any towing is to be done - camper trailer, caravan etc - would need to add the towball down weight to the vehicle kerb weight too.
So, assuming approximately another 100kg for the extras (water alone is 1kg/litre so 50 litres is 50kg), we are at 640kg payload and a GVM of 2640kg, some 130kg over GVM. Add any towball down weight - say 100kg - we are now 230kg over the GVM.
If a fully laden 4WD tourer, that is over its approved GVM, is involved in an accident, regardless of whose fault it is, what is the legal outcome?
Again, I ask the question - am I off the mark here?
An educational technical article in XXXX can assist people in prioritising their choices for after market products and obtain, if required, appropriate engineering approval and any required structural modifications to have their vehicle ADR approved and compliant.