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The Invisible Hero – Ironman 4×4 Suspension

Suspension is not something you often see when you first look at a rig.

But when you need it your suspension is the single most important upgrade you can make to your vehicle – and here’s why.

Original Equipment suspension is set up to support your vehicle for on-road conditions with a reasonable amount of weight. When you start to add vehicle accessories, attach a trailer or caravan and increase your load, the way the suspension handles the load changes drastically. Couple that with uneven surfaces and off-road conditions, the OEM suspension can more often than not, handle the additional strain.

Upgrading your suspension, especially when heading off-road can be the difference between a comfortable, enjoyable ride or a harrowing experience.

Below you can see which upgraded suspension components Ironman 4×4 has on offer to increase the load carrying capacity of your vehicle.

But what suits your needs?

Step one is calculating your weight requirements. You don’t want to fit Super class suspension, when you only need Light class. It will ruin the ride comfort of your vehicle if it is harder sprung than it needs to be. That being said, you don’t want it the other way around either. Overloaded suspension is severely detrimental to your vehicle’s road holding abilities and as a result the safety of you and your family.

We had a chat with the owner of Ironman 4×4 Mic van Zyl about certain suspension myths, truths and his advice on upgrading your suspension. Watch the video below to get expert advice on suspension upgrades.

When your load changes, so should your springs. Any heavy accessories or towing load added to your vehicle, changes the handling and overall safety when driving.

The vehicle’s springs must be matched to the load for optimum ride height and body control. Ironman 4×4 offer a range of springs to match the additional loads whether they are constant or temporary. When you start kitting out your vehicle, take into consideration the kerb weight and how much load you are adding, this will change what level of strength you need.

Below is an image with the different spring load options offered by Ironman 4×4. To calculate how much weight you have added as an percentage, you can use the following formula: % Weight added = (((Weight of accessories + Gross Vehicle Mass) / Gross Vehicle Mass) x 100)) – 100.

Once you have calculated the weight requirements of your rig’s suspension. step two is determining which type of terrain your vehicle will be used most often on.

The terrain you travel most, determines what type of shock absorber is right for you!

Forces generated by a loaded vehicle in rough terrain versus a lightly loaded vehicle in smooth terrain, differ greatly and can be considerably higher. Creating safe and appropriate dynamic handling at higher than original weights requires careful consideration. The range of Ironman 4×4 shock absorbers are designed to cover all terrains and possess the correct amount of damping resistance to provide a safe and comfortable ride.

Ironman 4×4 offers three different shock absorbers to cater for any vehicle’s requirements. Below you can see the key differences between their Nitrogas, Foamcell and Foamcell Pro shocks.

The Nitro Gas shock is the best value for affordable performance in all common conditions.
Highly versatile, the shock is a big step up above OEM suspension in performance and control.
– 35mm piston
– 54mm body
– 16mm piston rod
– Twin tube construction
– Nitrogen gas pressurised

The Foam Cell shock will enhance your off-road durability and performance while still maintaining excellent on-road characteristics.
Excels in off-road conditions where heat build-up is a concern, the Foam Cell shock is larger in size and holds more oil, providing a better dissipation of heat and longer-lasting performance in all terrains.
– 40mm piston
– 60mm body
– 18mm piston rod
– Twin-tube construction
– Foam cell technology

Foam Cell Pro shock, the premium shock, built to handle anything.
Originally designed to meet the demands of the armoured vehicle industry where reliability and durability are critical.
Foam Cell Pro is the ultimate shock when the going gets tough. Thicker and stronger than any other shock on the market, it is well suited to trades, fleet and serious off-roaders.
– 45mm piston
– 65-72mm body
– 20mm piston rod
– 3mm wall thickness
– Twin-tube construction
– Foam cell technology

At this point, you’ve looked at your weight requirements and the terrain you will be taking on. Now you need to decide if you want a soft or firm ride. Soft suspension will be more comfortable, but firm suspension will result in the vehicle handling better. In step three we look at different damping rates for the Ironman 4×4 shock absorbers.

Your preferred ride style is important to know when selecting the level of valving resistance in your shock absorbers.

While having a very insightful conversation with Mic van Zyl, he briefly touched on the subject of shock absorber maintenance. Watch the video below to receive his advice on how to get the best lifetime out of your shock:

Ironman 4×4 shock absorbers adapt to the velocity of the compression and rebound stroke which provides the right amount of control to suit your driving style.

The comfort range delivers smooth handling and less harshness for everyday use. Best suited to lighter vehicles without load, the shocks prioritise a soft comfortable ride, above all else.

The performance range adapts to a wide range of driving styles. Best suited to moderately loaded vehicles with some accessories, the shocks provide a balanced comfortable ride with more control.

The professional range controls body roll and reduces pitching while driving over all terrains. Best suited to heavily loaded vehicles with a higher centre of gravity, the shocks focus on maximising control and stability.

All of this information might sound overwhelming, but Ironman 4×4 takes the hassle out of selecting the right kit for your suspension needs. Below are the various suspension kits offered by Ironman 4×4 to make your life as easy as possible and have you out exploring the bush as soon as possible.


Ironman 4×4 suspension kits come with the essential parts to upgrade your ride, but why stop there?

To compliment your suspension kit, we also stock a wide range of components to further enhance your vehicle and driving experience.

For more information on Ironman 4×4’s specialist suspension kits, including pricing, availability and fitment – please use the enquiry form below. A member of their team will get back in touch with you shortly via email or phone call.

Enquire below

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    Disclaimer: Although the information shown above is presented in good faith and believed to be correct at the time of publishing, SA4x4 makes no representations or warranties as to the completeness or accuracy of the information. SA4x4 has no liability for any errors or omissions in the content freely displayed. Please note that all the prices shown below are subject to change without notice. Due to the nature of imported equipment shown above, please understand that we as a South African market are very dependent on the Rand/ Dollar exchange rates.

    SA4x4 encourages all patrons and users to check pricing of items shown online with vendors directly via our contact form.

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