The coil versus leaf argument is older than most of the vehicles having it, and it survives because both sides are right. Coils and leaves solve the same problem in different ways, and which one is better depends entirely on what the back of your 4WD spends its life doing.
How each one works
A coil spring is a wound steel spring that only handles the springing. The axle is located separately by control arms and a panhard rod, which is why coil rear ends ride and articulate so well. A leaf spring is a stack of steel blades clamped to the axle, doing the springing and the locating in one part. Simpler, cheaper, and inherently good at carrying weight along its length.
Where coils win
- Ride quality unloaded. A coil-sprung wagon on a corrugated road is a nicer place to be, full stop.
- Articulation. Coils allow more wheel travel, so tyres stay on the ground longer on rutted and rocky tracks. More contact, more traction.
- Tuning range. Spring rates, heights and shock pairings are easy to mix and match to a specific build.
Where leaf springs win
- Load carrying. A correctly specced leaf pack takes 600kg in the tray day after day without drama. That is why utes still leave the factory with them.
- Simplicity. Fewer components, fewer bushes, nothing exotic to fail 500km from a workshop.
- Cost. Leaf packs and their hardware are cheaper to buy, upgrade and repair.
| Feature | Coil Springs | Leaf Springs |
|---|---|---|
| Ride (Unloaded) | Excellent | Firm to harsh |
| Constant Heavy Loads | Needs careful spring choice | In its element |
| Articulation Off-Road | More travel | Less travel |
| Complexity | Control arms, panhard rod, more bushes | Minimal |
| Typical Layout | Wagons and the front of most utes | The rear of most utes |
So which is better for your 4WD?
For most owners this is not a conversion decision, because the vehicle already came one way and swapping spring types is engineering territory. The real question is speccing what you have for the load it actually carries. A wagon towing a van wants coils rated for the ball weight. A ute running a canopy, drawers and tools full-time wants a leaf pack built for that constant weight, not the factory compromise. And where the load comes and goes, airbag helper kits level the vehicle without wrecking the unloaded ride. We covered that trade-off in detail in Airbag Suspension: Is It Worth the Upgrade?
Whichever springs you run, the shocks decide how it all behaves. Springs hold the vehicle up, shocks control it, and a quality suspension setup matched to your weight beats a brand-name kit picked off a shelf. Our 7 tips for 4WD suspension upgrades covers the rest of that thinking.
Signs your current springs are wrong
- The rear sags with the camping gear in, and the headlights point at the treetops.
- It bottoms out on speed humps and driveway transitions it used to ignore.
- It porpoises after dips instead of settling in one movement, which is usually shocks past their best.
- A leaf ute crabs down the road or clunks over bumps, pointing at worn packs, bushes or shackles.
- Any of those means the suspension no longer matches the weight it carries, and that is a speccing conversation before it is a shopping one.
What do shocks and kits cost?
As a guide: quality aftermarket shocks run $120 to $400 per corner, so a set of four lands between roughly $500 and $1,600 plus fitting. A complete two inch lift with springs and shocks typically costs $1,500 to $3,500 fitted, moving up from there for remote-reservoir shocks or GVM-rated setups.
Frequently asked questions
Which is better, coil or leaf spring?
Coils for ride and articulation, leaves for constant heavy loads and simplicity. Neither is better outright, which is why most dual cabs run coils at the front and leaves at the back from the factory.
How much do 4 shocks cost?
Between about $500 and $1,600 for a quality set of four, plus fitting. Budget shocks cost less and last accordingly, particularly on corrugations where cheap valving fades fast.
Which suspension is best for touring?
The suspension matched to your touring weight. A coil wagon and a well-specced leaf ute both tour comfortably when the springs are rated for the loaded weight and the shocks can handle long corrugated sections without fading.
Springs are a weight question before they are a preference question. Bring the vehicle to Brookvale loaded the way it actually travels, and we will weigh it and spec springs, shocks or airbags against the real number. Book it in.
