Weighing the question of suspension
4x4
Suspension upgrades are about overlanding safety. Not status or 4x4 vehicle stance.
outhern Africa is the fantasy destination for most overlanders and all-terrain adventure drivers. Each year, American and European
Soverlanders embark on the adventure of a lifetime. Flying into South Africa, renting a 4x4, and following a route that often tracks across the Kalahari into Botswana, then loops through Namibia before returning to South Africa.
Comfort and control
Most drivers only think of suspension in terms of comfort. But the primary function is control: keeping the wheels in contact with the terrain, regardless of road surface texture and changes, to ensure optimal tyre contact patch geometry when you need all that grip during emergency braking or direction changes. And when dampers are overwhelmed by vehicle weight and highimpact road conditions( like those notorious corrugations on deep rural dirt roads), traction, braking, and steering control degrade.
For South Africans, having the world ' s most desirable wilderness adventure destinations and the most extensive network of dirt roads creates an irresistible incentive for true all-terrain vehicle travel. But experienced South African overlanders and all-terrain vehicle owners also know that a fully rigged and loaded bakkie or SUV often struggles to cope with the worst corrugated dirt roads or Richtersveldt trails, on factory suspension.
For overlanding and fully loaded 4x4 vehicles, the suspension and component needs are more aligned with commercial than passenger vehicles. Heavy-duty components that can handle higher load spikes and demanding duty cycles. This is why experienced overlanders, both private vehicle owners and fleet operators, choose to upgrade the suspension components of their bakkies and SUVs
Adventure travel fever and‘ just-in-case’ anxiety make many overlanders overpack. Unless you have a scale and log the hardware and items, you’ ll misunderstand how rapidly vehicle weight increases when preparing for a week- or month-long overlanding journey. Gross vehicle mass( GVM) is the total weight rating of a vehicle fully laden with fuel, fluids, passengers and cargo. And it’ s amazing how close a 4x4 vehicle can get to that GVM limit, even when it ' s conservatively packed for an overlanding journey.
Once a vehicle is operating near its GVM, the point loading on all its suspension components increases dramatically. And when those loads are spiked by terrain impacts, like rolling for hundreds of kilometres on harsh dirt road corrugations, those suspension links, bushings and internals, like seals and shims, take a pounding. The result? Degraded damping performance, which can cause a loss of traction when braking or steering to avoid an animal or cattle strike on a rural dirt road.
Factory vehicle suspension components are chosen for cost and to cover a bandwidth of load cases. Manufacturers use driving data gathered from the bulk of their bakkie and SUV customers, who are overwhelmingly urban, with most mileage on tar roads and carrying light loads.
Most double-cab bakkies and body-on-frame adventure SUVs have a load capacity of about 1000-1500kg above their kerb weight, until they reach their GVM. For adults, two kids, and their weekend away kit, the payload is only about 300-400kg. But a true overlanding loadout can double or even triple that weight, creating a much more severe load case on the vehicle ' s suspension. That’ s when you need to think bigger.
Oversized dampers have more space inside for damper fluid and shim stacks, meaning a more advanced fluid dynamics set-up, which is less likely to overheat and cause cavitation – the bubbling of suspension fluid under extreme loads, which reduces its ability to act as a suspension fluid.
Larger diameter dampers better distribute more load through their structures and are less likely to wear seals prematurely, bend stanchions or damage the internals. A larger damper structure also means greater surface area for heat dissipation, which is especially important in Southern Africa, where summer heat conditions are extreme.
WORDS IN ACTION 7 MARCH 2026