Leaf Springs
Types of Leaf Springs
Heavy Duty Leaf Springs
Heavy duty leaf springs are designed for 4WDs carrying consistent loads - touring setups with canopies, drawers, fridges, water tanks, and camping gear that keep the rear end under pressure over long distances. Built with higher spring rates than factory replacements, they resist sag under load and maintain correct ride height and geometry when the ute is fully packed. A straight replacement upgrade for any touring rig that's regularly loaded to or near its rated payload.
Parabolic Leaf Springs
Parabolic leaf springs use a tapered design - thicker at the centre, tapering toward the ends - which gives them a progressive spring rate and significantly better ride quality than traditional multi-leaf springs. Less friction between leaves means less harshness on corrugated roads and better articulation off-road. Popular with touring builds that spend time on rough tracks and need a spring that performs well both loaded and unloaded.
Constant Load Leaf Springs
Constant load springs are engineered to maintain consistent ride height and handling under a set, permanent load - common fitment for work vehicles running canopies, toolboxes, and equipment that doesn't change day to day. If your ute carries the same weight consistently rather than varying between loaded touring and empty running, a constant load spring keeps geometry and handling predictable.
Replacement Leaf Springs
Standard replacement leaf springs restore factory ride height and spring rate on worn or sagged suspension. If your rear end is sitting low even unloaded, or you're getting excessive bounce and body roll, worn leaf springs are usually the cause. Replacement springs are available for most popular 4WD and ute platforms and are a straightforward way to restore correct suspension geometry before it starts affecting tyre wear and handling.
Leaf Spring Brands at 4Wheelhouse
4Wheelhouse stocks leaf springs from EFS, Tough Dog, Ironman 4x4, Raw 4x4, Rancho, and Hulk 4x4 - all engineered for Australian conditions with vehicle-specific fitment for HiLux, Ranger, LandCruiser 70 and 79 Series, Nissan Patrol, Mitsubishi Triton, Isuzu D-Max, and more. Use the vehicle filter to find springs confirmed for your exact make, model, and year.
Fitting Leaf Springs
Leaf spring replacement requires a hydraulic jack, jack stands, and basic hand tools - the rear axle needs to be supported independently while the springs are unbolted and swapped. A wheel alignment is recommended after any suspension change. If you'd rather have it done right first time, our fitment centres in Sydney (Smithfield) and Queensland (Sumner Park, Brisbane) handle leaf spring installations. Victorian customers can pick up or have orders dispatched from our Dandenong warehouse.
Frequently Asked Questions
Leaf springs are a suspension component made from one or more curved strips of spring steel, stacked and clamped together. They connect the axle to the chassis, absorb road impacts, support the vehicle's weight, and maintain correct ride height and axle position. Leaf springs are the standard rear suspension on most dual-cab utes and heavy-duty 4WDs in Australia due to their load-carrying capacity and durability.
Parabolic leaf springs use a tapered profile - thicker in the centre and thinner toward the ends - which gives a progressive spring rate rather than a fixed rate. This taper reduces inter-leaf friction, the main cause of harshness in traditional multi-leaf springs. The result is better ride quality on rough roads, improved articulation off-road, and more predictable handling across a wider range of loads. A popular upgrade on HiLux, Ranger, and Patrol platforms used for serious touring.
Standard multi-leaf springs use multiple flat steel leaves of similar thickness that slide against each other under compression, creating friction and a harsher ride. Parabolic leaf springs use tapered leaves that flex more independently, reducing friction and providing a smoother, more progressive ride. Standard springs handle higher constant loads well. Parabolic springs offer better ride quality and articulation - a clear advantage for off-road and touring use.
It depends on the application. Coil springs generally provide better ride quality, more suspension travel, and superior off-road articulation - which is why they're preferred on dedicated off-road builds. Leaf springs have higher load-carrying capacity, are more durable under constant heavy loads, and are simpler to maintain - which is why they're standard on most dual-cab utes and commercial 4WDs. For a touring rig carrying heavy loads over long distances, a quality set of heavy duty or parabolic leaf springs is often the better practical choice.
The main signs are rear end sag even when the vehicle is unloaded, excessive bounce or body roll on rough roads, uneven ride height side to side, or visible cracking and separation in the spring leaves. A sagging rear end affects tyre wear, handling, headlight aim, and tow ball weight if you're towing. If the rear of your ute sits noticeably lower than it should or bounces excessively on corrugations, the springs are worn and need replacing.
Heavy duty or constant load leaf springs are the right choice for a rig carrying consistent touring loads - canopy, drawers, fridge, water tanks, and camping gear. Parabolic heavy duty springs give the best of both - a higher load rating than factory springs with better ride quality than standard multi-leaf setups. EFS, Tough Dog, and Ironman 4x4 all produce options in this category. Use the vehicle filter on 4Wheelhouse to find springs rated for your specific platform, and contact the team if you need advice on spring rate selection for your build.