Avoid Four Car Lengths: Highway vs All Terrain Tyres in Australia
If you spend almost all your time on sealed roads, choose a highway terrain tyre for refinement and the shortest wet braking distance. If you regularly use gravel or dirt tracks, a mild all terrain tyre is the better compromise, and aggressive all terrain or mud terrain tyres suit serious off road use. Test results vary widely between all terrain models, so check braking and wet performance data before you buy.
TL;DR:
- Many all terrain tyres perform poorly in wet braking, requiring up to four additional car lengths to stop from 80 km/h compared to highway tyres.
- Off-road, all terrain tyres with wider voids and reinforced sidewalls provide significantly better traction and impact resistance on loose surfaces and rocky trails.
- Mild all terrain tyres offer a good balance for drivers who split roughly 70/30 between sealed and unsealed roads, but aggressive models mainly benefit serious off-road users.
- Using the correct tyre size and load rating is essential for roadworthiness, with verified fitters recommended before upgrading to larger all terrain options.
- Check independent test data on wet braking and performance to avoid choosing an all terrain tyre that underperforms on sealed roads.
Table of Contents
- Tread design and construction: what physically differs
- On road performance: comfort, noise, braking and wet handling
- Off road capability: gravel, dirt, mud and light rock
- Trade-offs, mileage and matching the tyre to your driving
- Fitment, safety checks and roadworthy requirements
- How to shortlist and fit the right tyre without guesswork
- A quick word on getting this decision wrong
- Take the guesswork out of your tyre choice
- Key test reports and guidance used in this article
- Sources
- FAQ
Tread design and construction: what physically differs
The difference between highway terrain and all terrain tyres starts in the tread pattern. Highway terrain (HT) tyres use closely packed tread blocks with narrow grooves, built to maximise contact with sealed roads and minimise noise. All terrain (AT) tyres use larger, more widely spaced blocks with deeper voids designed to bite into loose surfaces and clear mud and stones.
That difference carries through to the whole tyre, not just the tread.
- HT tyres generally have lighter sidewalls and lower rolling resistance, suited to bitumen.
- AT tyres often use reinforced sidewalls and tougher compounds to resist punctures and impact damage.
- Wider voids on AT tyres improve traction off road but tend to increase noise and rolling resistance on sealed roads.
- Shoulder design differs too: AT tyres often have blockier shoulders for grip when a wheel digs into a rut or edge.
These construction choices are why an AT tyre feels heavier and firmer at highway speed, and why an HT tyre struggles once the seal ends.
On road performance: comfort, noise, braking and wet handling
This is where the gap between the two tyre types matters most for everyday safety. Independent testing has repeatedly found that many all terrain tyres brake noticeably worse in the wet than road biased tyres.
In ADAC’s 2025 all terrain tyre test, some models needed significantly more distance, over several car lengths, to stop from 80 km/h in the wet compared with a road biased reference tyre. That’s roughly four car lengths of extra distance, enough to change the outcome of an emergency stop.
- Wet braking and aquaplaning resistance are the biggest on road weaknesses of aggressive AT tyres.
- HT tyres are quieter and more comfortable at highway speed, which reduces driver fatigue on long trips.
- AT tyres carry a fuel economy penalty from higher rolling resistance, though the gap narrows with milder AT designs.
None of the AT tyres in that ADAC group earned an overall recommendation, largely because their wet performance fell short of a premium road tyre in key tests.
Off road capability: gravel, dirt, mud and light rock
Off the sealed road, the picture reverses. The larger tread blocks and wider voids that hurt an AT tyre’s wet braking are exactly what let it dig into loose gravel, dirt and mud and clear debris from the tread face as it rotates.
Reinforced sidewalls also matter here. On rutted farm tracks, rocky trails or corrugated gravel roads, a stronger sidewall resists cuts and impacts that would puncture a standard HT tyre. That’s a real practical advantage for anyone who tows to a rural property, drives to beach access points, or covers unsealed roads on the way to a job site.
- Wider tread voids improve self cleaning in mud and loose dirt.
- Reinforced sidewalls cut the risk of punctures from rocks and sharp gravel edges.
- Even mild AT tyres give a noticeable traction improvement over HT tyres on unsealed surfaces.
Testers have also found that drivetrain matters as much as tyre choice on gravel: a well driven 2WD on a quality road tyre can sometimes match an AT tyre when the surface is firm and dry, which suggests tyre category alone isn’t the whole story.
Trade-offs, mileage and matching the tyre to your driving
Every gain off road comes with a cost on it, and the size of that cost depends on how aggressive the tyre is. Fuel use rises with rolling resistance, cabin noise increases with block size, and tread wear patterns shift once a chunkier AT pattern goes on the car.
A mild AT keeps most of the highway manners of an HT tyre while adding useful gravel and dirt traction. An aggressive AT sacrifices more wet grip and quiet running in exchange for real capability in mud, sand and rock.
- If more than 95% of your driving is on sealed roads, an HT tyre gives the best mix of comfort, economy and wet safety.
- If you’re on a roughly 70/30 split of sealed to unsealed roads, a mild AT is usually the better all rounder.
- If you’re regularly on mud, sand or rock, or your split runs closer to 50/50, step up to an aggressive AT or a mud terrain tyre.
Pro Tip: Don’t choose by tread photo alone. Two tyres that look equally aggressive can differ by more than 15 metres in wet braking, so check independent test data before deciding.
Fitment, safety checks and roadworthy requirements
Before buying any tyre, check the vehicle’s tyre placard, usually on the driver’s door jamb or in the owner’s manual, for the correct load index and speed rating. Fitting a tyre below the placard rating can affect roadworthiness and may be flagged during a vehicle inspection.
- Sidewall codes list size, load index and speed rating together, always cross check all three against the placard.
- Roadworthy inspectors check that fitted tyres meet the manufacturer’s specified load and speed ratings, not just the tyre size.
- Use a tyre size calculator to confirm an upsized AT tyre won’t throw off your speedometer or rub on guards.
- Confirm fitment with a verified fitter before committing, especially when moving from HT to a larger AT size.
How to shortlist and fit the right tyre without guesswork
Treadivo lets you search by vehicle or exact tyre size, so you’re only shown tyres that fit, and every listed job comes from a verified fitter with a completed, confirmed booking history. That removes most of the guesswork that leads people to buy the wrong size or rating.
- Use the augmented reality preview to see how an HT or AT tread pattern will actually look on your car before buying.
- Run your rego or tyre size through the tyre size calculator to check clearance and speedometer impact before upsizing.
- Follow a simple flow: check your placard, shortlist models with solid wet braking results, then book a verified local fitter.
That sequence, placard first, test data second, fitter last, avoids the two most common mistakes drivers make when switching tyre styles.
A quick word on getting this decision wrong
The most common mistake is fitting an aggressive all terrain tyre for a car that never leaves sealed roads, trading away wet braking and quiet running for capability that never gets used. If your driving is mostly bitumen, an HT tyre will serve you better; save the aggressive AT for when you actually need it.
— Areesh
Take the guesswork out of your tyre choice
Choosing between highway terrain and all terrain tyres gets easier once you can see the fit and the fitter before you commit. A platform offering search by vehicle or tyre size, transparent itemised pricing, and augmented reality preview lets you compare an HT and an AT option side by side on your own car, with no hidden fees added at checkout.
- Search by model or tyre size to see only tyres that actually fit your car.
- Preview HT and AT tread styles on your vehicle using the AR tool before you buy.
- Book a local fitter with fitting confirmation once you’ve picked your tyre.
Head to the tyres page to compare highway terrain and all terrain options and lock in a fitting slot near you.
Key test reports and guidance used in this article
The ADAC all terrain test, TyreReviews’ 2026 all terrain test and NT tyre rating guidance informed the safety and fitment claims above.
Sources
FAQ
Is highway terrain a good tyre for daily driving?
Yes, for a vehicle that mostly stays on sealed roads, an HT tyre gives quieter running, better fuel economy and shorter wet braking than most all terrain options. It’s the better everyday choice unless you regularly leave the bitumen.
Can all terrain tyres be used on the highway?
All terrain tyres can be driven on the highway, but testing shows some models need meaningfully longer to stop in the wet than road biased tyres, as seen in ADAC’s 2025 test. A mild AT design keeps more of that on road safety margin than an aggressive one.
Are RT tyres good for daily driving?
Rugged terrain (RT) tyres sit between mild AT and aggressive AT in tread aggressiveness, so they suit drivers who need some off road grip but still do most of their driving on sealed roads. They generally ride quieter than an aggressive AT but noisier than an HT tyre.
What are the disadvantages of all terrain tyres?
The main downsides are increased road noise, higher rolling resistance and, in some models, longer wet braking distances compared with highway terrain tyres. Independent testing shows this varies a lot between models, so checking test results before buying matters more than the AT label itself.