
SUSPENSION
GVM UPGRADES
Federally approved GVM Upgrades to assist with carrying more weight in your vehicle
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SUSPENSION
GVM UPGRADES
Federally approved GVM Upgrades to assist with carrying more
weight in your vehicle.
EXPLORE:
EXPLORE SUSPENSION: SHOCK ABSORBERS | SPRINGS & COMPONENTS | UPPER CONTROL ARMS | GVM | ALL TERRAIN SUSPENSION
All vehicles are manufactured with a Gross Vehicle Mass (GVM) limit, also known as Gross Vehicle Weight Rating (GVWR). The GVM is both the legal limit and the manufacturer’s warranted limit for how heavy your vehicle is ever allowed to be. It is not to be confused with the vehicle’s payload – which is the total weight the vehicle is designed to carry.
The GVM is the sum of the vehicle, fuel, oils, luggage, passengers, 4×4 accessories AND for those who tow, it includes the towbar/tow hitch itself, and the tow ball weight, which is transferred from your caravan/trailer/boat etc to your car.

WHAT IS A GVM UPGRADE?
GVM upgrade kits most commonly consist of replacing the original suspension equipment with more capable equipment that is designed to carry greater weight. Replacing components such as springs and shock absorbers allows the vehicle to carry additional weight, without compromising on its handling, function and safety features. Of course, to ensure this is the case, all GVM upgrades are rigorously tested and approved by the Department of Infrastructure, Transport, Regional Development, Communications and Arts. During the GVM upgrade process, axle load limits are also commonly tested and validated to increase the permissible load over each axle.
A GVM upgrade, will commonly see your vehicle’s GVM and retrospectively your overall payload increase by up to 300kg!
WEIGHT EXAMPLE

A popular dual cab ute weighs 2280kg off the showroom floor, with no fuel, passengers, or accessories. That same vehicle has a total payload of 920kg which results in a Gross Vehicle Mass (GVM) of 3200kg. While 920kg is a solid amount of payload, it is not uncommon to quickly use it all – and then some.
VEHICLE KERB WEIGHT | Starting Weight: 2280kg | |
Tank of fuel with a long-range fuel tank | + 130kg | 2410kg |
Four Passengers, averaging 70kg each | +280kg | 2690kg |
Bull Bar, Winch, Driving Lights & Bash Plate | + 140kg | 2830kg |
Dual Battery | + 25kg | 2855kg |
Drawers, Canopy & Roof Racks | + 200kg | 3055kg |
60L Fridge, full with food and drinks | + 40kg | 3095kg |
Dry Food, Wine & Water | + 20kg | 3115kg |
Compressor, Recovery Straps, Shovel & Treds | + 40kg | 3155kg |
Rims & Tyre Upgrade | + 50kg | 3205kg |
Tools | + 40kg | 3245kg |
2.5 Tonne Van Downball Weight | + 250kg | 3495kg |
TOTAL WEIGHT OF VEHICLE | 3495kg | |
MAX. GROSS VEHICLE MASS | 3200kg | EXCEEDED BY 295kg |
WITH IRONMAN 4X4 300kg GVM UPGRADE | 3500kg | REMAINING 5kg |

WEIGHT EXAMPLE
A popular dual cab ute weighs 2280kg off the showroom floor, with no fuel, passengers, or accessories. That same vehicle has a total payload of 920kg which results in a Gross Vehicle Mass (GVM) of 3200kg. While 920kg is a solid amount of payload, it is not uncommon to quickly use it all – and then some.
DOES A GVM UPGRADE INCREASE GCM?
Simply put, no it does not. But why?
First of all, what is GCM? It is the Gross Combined Mass (GCM) which is the combined total weight of your tow vehicle and trailer including all the extra weight, whether it be your accessories, your payload, your trailer or your caravan. While you may logically think that it would be the combination of your GVM and your vehicle’s towing capacity, this may not always be the case. This is why it’s always best to check your owner’s manual for a definitive answer. As for why a GVM upgrade doesn’t increase the total GCM, it is due to the fact that the GVM upgrade only affects how much the vehicle itself can carry, rather than the overall total, as it is determined by a multitude of factors set by the vehicle’s manufacturer.
DOES A GVM UPGRADE INCREASE TOWING CAPACITY?
No it does not. Instead, it can actually decrease your towing capacity regardless of whether or not it’s your braked towing capacity or your unbraked towing capacity.
As stated above, the GVM upgrade will not increase your GCM. This means that should you reach the new maximum weight, your towing capacity will drop as you have essentially shifted the weight from the potential caravan or trailer to the vehicle itself.
PRE-REGISTRATION VS POST-REGISTRATION
If a GVM upgrade is installed on a vehicle before it is first registered (pre-registration), the GVM upgrade carries Federal approval. This means that the upgrade is recognised in all states and territories of Australia and is transferrable with the sale of the vehicle into any state.
A GVM upgrade can be applied to a vehicle after it is already registered (post-registration), however, there are some additional steps which include the sign-off from an independent engineer and the GVM upgrade is not transferrable on the sale of the vehicle into any other state. Please note, this does not affect your visiting other states at your increased GVM capacity, it is purely a restriction on the transfer of ownership.
FIND YOUR VEHICLE
SO YOU NEED A GVM UPGRADE?
The first step to getting a GVM Upgrade is understanding if your vehicle is capable of carrying the additional weight.
Ironman 4×4 offer a wide range of federally approved GVM Upgrades to suit different vehicles.
Select your vehicle from the left hand side, determine whether you need a pre or post-registration upgrade and get a quote from your local Approved GVM Installer.
GVM UPGRADES TO SUIT FORD RANGERS
Find your vehicle below for federally approved GVM Upgrades to suit your Ranger.
FORD RANGER PXIII (7/2018 – 2022)
ORIGINAL EQUIPMENT (OE) | IRONMAN 4X4 | ||
Gross Vehicle Mass | 3200kg | 3500kg | + 300kg |
FORD RANGER PXII (2015 – 6/2018
ORIGINAL EQUIPMENT (OE) | IRONMAN 4X4 | ||
Gross Vehicle Mass | 3200kg | 3500kg | + 300kg |
FORD RANGER PX (2011 – 2015)
ORIGINAL EQUIPMENT (OE) | IRONMAN 4X4 | ||
Gross Vehicle Mass | 3200kg | 3500kg | + 300kg |
GVM UPGRADES TO SUIT HOLDEN COLORADO
Find your vehicle below for federally approved GVM Upgrades to suit your Colorado.
HOLDEN COLORADO (RG 2016+)
ORIGINAL EQUIPMENT (OE) | IRONMAN 4X4 | ||
Gross Vehicle Mass | 3150kg | 3500kg | + 350kg |
HOLDEN COLORADO (RG 2012 – 2015)
ORIGINAL EQUIPMENT (OE) | IRONMAN 4X4 | ||
Gross Vehicle Mass | 2900kg | 3500kg | + 600kg |
GVM UPGRADES TO SUIT ISUZU D-MAX
Find your vehicle below for federally approved GVM Upgrades to suit your D-Max.
ISUZU D-MAX 2022+
ORIGINAL EQUIPMENT (OE) | IRONMAN 4X4 | ||
Gross Vehicle Mass | 3100kg | 3500kg | + 400kg |
ISUZU D-MAX (2020 – 12/2021)
ORIGINAL EQUIPMENT (OE) | IRONMAN 4X4 | ||
Gross Vehicle Mass | 3100kg | 3500kg | + 400kg |
ISUZU D-MAX (2012 – 7/2019)
ORIGINAL EQUIPMENT (OE) | IRONMAN 4X4 | ||
Gross Vehicle Mass | 2950kg – 3050kg | 3500kg | + 450 – 550kg |
GVM UPGRADES TO SUIT MAZDA BT-50
Find your vehicle below for federally approved GVM Upgrades to suit your BT50.
MAZDA BT-50 (6/2022+)
ORIGINAL EQUIPMENT (OE) | IRONMAN 4X4 | ||
Gross Vehicle Mass | 3100kg | 3500kg | + 400kg |
MAZDA BT-50 (6/2020 – 12/2021)
ORIGINAL EQUIPMENT (OE) | IRONMAN 4X4 | ||
Gross Vehicle Mass | 3100kg | 3500kg | + 400kg |
GVM UPGRADES TO SUIT NISSAN NAVARA
Find your vehicle below for federally approved GVM Upgrades to suit your Navara.
NAVARA D23/NP300 Series 5 2022+ (Coil Spring Only)
ORIGINAL EQUIPMENT (OE) | IRONMAN 4X4 | ||
Gross Vehicle Mass | S/C-K/C 2910kg D/C 3150kg |
3340kg | + 190 – 430kg |
GVM UPGRADES TO SUIT SUZUKI JIMNY
Find your vehicle below for federally approved GVM Upgrades to suit your Jimny.
SUZUKI JIMNY GJ 2018+
ORIGINAL EQUIPMENT (OE) | IRONMAN 4X4 | ||
Gross Vehicle Mass | 1435kg | 1785kg | + 350kg |
GVM UPGRADES TO SUIT TOYOTA HILUX
Find your vehicle below for federally approved GVM Upgrades to suit your Hilux.
TOYOTA HILUX (2015+)
ORIGINAL EQUIPMENT (OE) | IRONMAN 4X4 | ||
Gross Vehicle Mass | 3050kg | 3500kg | + 450kg |
ORIGINAL EQUIPMENT (OE) | IRONMAN 4X4 | ||
Gross Vehicle Mass | 3050kg | 3510kg | + 460kg |
TOYOTA HILUX (2005 – 2015)
ORIGINAL EQUIPMENT (OE) | IRONMAN 4X4 | ||
Gross Vehicle Mass | 2850kg | 3350kg | + 500kg |
GVM UPGRADES TO SUIT TOYOTA LANDCRUISER 78 SERIES
Find your vehicle below for federally approved GVM Upgrades to suit your LC78.
TOYOTA LANDCRUISER 78 SERIES TROOP CARRIER (2007+)
ORIGINAL EQUIPMENT (OE) | IRONMAN 4X4 | ||
Gross Vehicle Mass | 3300kg | 3900kg | + 600kg |
GVM UPGRADES TO SUIT TOYOTA LANDCRUISER 79 SERIES
Find your vehicle below for federally approved GVM Upgrades to suit your LC79.
TOYOTA LANDCRUISER 79 SERIES SINGLE CAB (2007+)
ORIGINAL EQUIPMENT (OE) | IRONMAN 4X4 | ||
Gross Vehicle Mass | 3400kg | 3900kg | + 500kg |
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TOYOTA LANDCRUISER 79 SERIES DUAL CAB (2012+)
ORIGINAL EQUIPMENT (OE) | IRONMAN 4X4 | ||
Gross Vehicle Mass | 3300kg | 3900kg | + 600kg |
GVM UPGRADES TO SUIT TOYOTA LANDCRUISER 200 SERIES
Find your vehicle below for federally approved GVM Upgrades to suit your LC200.
TOYOTA LANDCRUISER 200 SERIES (2007+)
ORIGINAL EQUIPMENT (OE) | IRONMAN 4X4 | ||
Gross Vehicle Mass | 3300 – 3350kg | 3580 – 4000kg | + 280 – 650kg |
FIND YOUR VEHICLE
SO YOU NEED A GVM UPGRADE?
The first step to getting a GVM Upgrade is understanding if your vehicle is capable of carrying the additional weight.
Ironman 4×4 offer a wide range of federally approved GVM Upgrades to suit different vehicles.
Select your vehicle from the left-hand side, determine whether you need a pre or post-registration upgrade and get a quote from your local Approved GVM Installer.
GVM UPGRADES TO SUIT FORD RANGERS
Find your vehicle below for federally approved GVM Upgrades to suit your Ranger.
FORD RANGER PXIII (7/2018 – 2022)
Gross Vehicle Mass |
ORIGINAL EQUIPMENT (OE) 3200kg |
IRONMAN 4X4 3500kg |
ADDITIONAL LOAD + 300kg |
FORD RANGER PXII (2015 – 6/2018)
Gross Vehicle Mass |
ORIGINAL EQUIPMENT (OE) 3200kg |
IRONMAN 4X4 3500kg |
ADDITIONAL LOAD + 300kg |
FORD RANGER PX (2011 – 2015)
Gross Vehicle Mass |
ORIGINAL EQUIPMENT (OE) 3200kg |
IRONMAN 4X4 3500kg |
ADDITIONAL LOAD + 300kg |
GVM UPGRADES TO SUIT HOLDEN COLORADO
Find your vehicle below for federally approved GVM Upgrades to suit your Colorado.
HOLDEN COLORADO (RG 2016+)
Gross Vehicle Mass |
ORIGINAL EQUIPMENT (OE) 3150kg |
IRONMAN 4X4 3500kg |
ADDITIONAL LOAD + 350kg |
HOLDEN COLORADO (RG 2012 – 2015)
Gross Vehicle Mass |
ORIGINAL EQUIPMENT (OE) 2900kg |
IRONMAN 4X4 3500kg |
ADDITIONAL LOAD + 600kg |
GVM UPGRADES TO SUIT ISUZU D-MAX
Find your vehicle below for federally approved GVM Upgrades to suit your D-Max.
ISUZU D-MAX (2022+)
Gross Vehicle Mass |
ORIGINAL EQUIPMENT (OE) 3100kg |
IRONMAN 4X4 3500kg |
ADDITIONAL LOAD + 400kg |
ISUZU D-MAX (2020 – 12/2021)
Gross Vehicle Mass |
ORIGINAL EQUIPMENT (OE) 3100kg |
IRONMAN 4X4 3500kg |
ADDITIONAL LOAD + 400kg |
ISUZU D-MAX (2012 – 7/2019)
Gross Vehicle Mass |
ORIGINAL EQUIPMENT (OE) 2950kg – 3050kg |
IRONMAN 4X4 3500kg |
ADDITIONAL LOAD + 450kg – 550kg |
GVM UPGRADES TO SUIT MAZDA BT-50
Find your vehicle below for federally approved GVM Upgrades to suit your BT50.
MAZDA BT-50 (6/2022+)
Gross Vehicle Mass |
ORIGINAL EQUIPMENT (OE) 3100kg |
IRONMAN 4X4 3500kg |
ADDITIONAL LOAD + 400kg |
MAZDA BT-50 (6/2020 – 12/2021)
Gross Vehicle Mass |
ORIGINAL EQUIPMENT (OE) 3100kg |
IRONMAN 4X4 3500kg |
ADDITIONAL LOAD + 400kg |
GVM UPGRADES TO SUIT NISSAN NAVARA
Find your vehicle below for federally approved GVM Upgrades to suit your Navara.
NAVARA D23/NP300 Series 5 2022+ (Coil Spring Only)
Gross Vehicle Mass |
ORIGINAL EQUIPMENT (OE) S/C-K/C 2910kg D/C 3150kg |
IRONMAN 4X4 3340kg |
ADDITIONAL LOAD S/C-K/C + 430kg D/C + 190kg |
GVM UPGRADES TO SUIT SUZUKI JIMNY
Find your vehicle below for federally approved GVM Upgrades to suit your Jimny.
SUZUKI JIMNY (GJ 2018+)
Gross Vehicle Mass |
ORIGINAL EQUIPMENT (OE) 1435kg |
IRONMAN 4X4 1785kg |
ADDITIONAL LOAD + 350kg |
GVM UPGRADES TO SUIT TOYOTA HILUX
Find your vehicle below for federally approved GVM Upgrades to suit your Hilux.
TOYOTA HILUX (2015+)
Gross Vehicle Mass |
ORIGINAL EQUIPMENT (OE) 3050kg |
IRONMAN 4X4 3500kg |
ADDITIONAL LOAD + 450kg |
Gross Vehicle Mass |
ORIGINAL EQUIPMENT (OE) 3050kg |
IRONMAN 4X4 3510kg |
ADDITIONAL LOAD + 460kg |
TOYOTA HILUX (2005 – 2015)
Gross Vehicle Mass |
ORIGINAL EQUIPMENT (OE) 2850kg |
IRONMAN 4X4 3350kg |
ADDITIONAL LOAD + 500kg |
GVM UPGRADES TO SUIT TOYOTA LANDCRUISER 78 SERIES
Find your vehicle below for federally approved GVM Upgrades to suit your LC78.
TOYOTA LANDCRUISER 78 SERIES TROOP CARRIER (2007+)
Gross Vehicle Mass |
ORIGINAL EQUIPMENT (OE) 3300kg |
IRONMAN 4X4 3900kg |
ADDITIONAL LOAD + 600kg |
GVM UPGRADES TO SUIT TOYOTA LANDCRUISER 79 SERIES
Find your vehicle below for federally approved GVM Upgrades to suit your LC79.
TOYOTA LANDCRUISER 79 SERIES SINGLE CAB (2007+)
Gross Vehicle Mass |
ORIGINAL EQUIPMENT (OE) 3300kg |
IRONMAN 4X4 3900kg |
ADDITIONAL LOAD + 600kg |
TOYOTA LANDCRUISER 79 SERIES DUAL CAB (2012+)
Gross Vehicle Mass |
ORIGINAL EQUIPMENT (OE) 3300kg |
IRONMAN 4X4 3900kg |
ADDITIONAL LOAD + 600kg |
GVM UPGRADES TO SUIT TOYOTA LANDCRUISER 200 SERIES
Find your vehicle below for federally approved GVM Upgrades to suit your LC200.
TOYOTA LANDCRUISER 200 SERIES (2007+)
Gross Vehicle Mass |
ORIGINAL EQUIPMENT (OE) 3300kg – 3350kg |
IRONMAN 4X4 3580kg – 4000kg |
ADDITIONAL LOAD + 280kg – 650kg |