Quick answer: For roadside tyre changes, a compact bottle jack suits most heavy cars, utes and 4WDs, while a small trolley jack is faster and more stable if you have boot space. Whatever you choose, its rating must comfortably exceed the weight it will lift, it needs a stable base, and it must reach your vehicle’s ride height. Carry a base plate for soft or hot ground.
The jack that came with your car will get a wheel off in an emergency, but many drivers upgrade to something more stable and easier to use — especially owners of heavier SUVs and 4WDs. Here’s how the main jack types compare for roadside work in Australian conditions, and how to choose one that’s actually safe under your vehicle.
What types of car jack are there?
| Type | Best for | Trade-offs |
|---|---|---|
| Scissor jack | The factory emergency jack; light cars, tight boot space | Slow to wind, less stable, low capacity, tippy on uneven ground |
| Bottle (hydraulic) jack | Heavy cars, utes, 4WDs; high lifting capacity in a small package | Tall minimum height may not fit under low cars; needs firm, level ground |
| Trolley (floor) jack | Fast, stable lifting; great at home and roadside if you have room | Heavy and bulky to carry; small ones lack lift height for 4WDs |
| High-lift / farm jack | Serious off-road recovery and lifted 4WDs | Dangerous if misused; not for everyday sealed-road tyre changes |
How do you match a jack to your car’s weight?
This is the number that matters. A jack’s rating must comfortably exceed the load it will carry. As a rough rule, a jack only lifts one corner or one end of the car, but you should still choose a capacity with a healthy safety margin over that share of the kerb weight.
As a practical guide, many people run a jack rated well above what they strictly need — for example a 2-tonne-plus jack for a mid-size car and a 3-tonne unit for a full-size 4WD or loaded ute — so it works within its comfortable range rather than at its limit. Check your vehicle’s kerb weight on the tyre placard or in the manual and buy accordingly. Never guess.
Does lift height matter?
Yes — two ways. The jack’s minimum height must be low enough to slide under your car when a tyre is flat (a problem with tall bottle jacks under low cars), and its maximum height must be tall enough to raise a big 4WD until the inflated spare clears the ground. Lifted 4WDs and SUVs often need extra reach that a small trolley jack simply doesn’t have, which is why a bottle jack (sometimes on a base) is popular for tall vehicles.
Why does the base and ground surface matter?
A jack is only as safe as what it stands on. On an Australian roadside you’ll meet soft gravel shoulders, sloping verges and bitumen soft enough to indent on a 40°C day. A narrow jack base sinks or tips. Two habits fix this:
- Carry a sturdy base plate — a thick offcut of timber or a purpose-made pad — to spread the load on soft or hot ground.
- Always jack on the firmest, most level spot you can find, and use the correct jacking point.
What should be in your roadside kit?
A jack alone isn’t a tyre-change kit. Alongside it, carry:
- A quality wheel brace or breaker bar — and ideally a torque wrench to finish the nuts correctly.
- A wheel chock, gloves and a hi-vis vest.
- A base plate for the jack.
- A portable air compressor so you can top up the spare and re-inflate after any off-road driving.
For remote travel, some drivers pair a jack with a full tyre repair kit rather than relying on a single spare.
Which jack should most Australians carry?
For a typical passenger car, the factory scissor jack is adequate for the rare roadside change, but a small trolley jack or a good bottle jack is faster and more stable if it fits your boot. For utes, SUVs and 4WDs, a bottle jack with enough lift height plus a base plate is the common choice because it packs a lot of capacity into a small, tough unit. Off-road tourers add specialist recovery jacks on top, but those are a separate tool — not the one you reach for on the highway shoulder.
Bottom line: Choose a jack rated well above the weight it will lift, tall enough to raise your car until the spare clears, and stable enough for a soft Australian shoulder. A bottle jack suits heavy vehicles, a small trolley jack suits cars with boot space, and a base plate belongs in every kit. Always finish on jack stands for any work beyond a quick wheel swap.
Frequently asked questions
What size jack do I need for my car?
Pick a rating that comfortably exceeds the share of your car’s weight the jack will lift — many owners choose 2 tonnes or more for cars and around 3 tonnes for heavy 4WDs and utes. Check your kerb weight and buy with margin to spare.
Is a bottle jack or trolley jack better for roadside use?
A bottle jack is compact and has huge capacity, ideal for heavy or tall vehicles, but needs firm ground and may be too tall for low cars. A trolley jack is more stable and faster but bulkier to carry. Choose by your vehicle height and available boot space.
Can I use the factory scissor jack?
Yes, it’s designed for your car and fine for an occasional emergency change on firm, level ground. Many drivers still upgrade for stability and ease, particularly with heavier vehicles.
Do I need jack stands as well?
For a quick roadside wheel swap you work from the jack. For any work where you put yourself under the car, always support it on rated jack stands first — never trust a jack alone.
We describe jack classes rather than specific models or prices, which change constantly. Confirm the rating, minimum and maximum lift height against your own vehicle’s weight and ride height before buying, and follow the jack manufacturer’s instructions.
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