AT Tyre Overview
The AT (All-Terrain) tyre has been around for many years and is still the preferred choice for 4WD owners who wants to use their vehicle both on and off road. Unlike HT (Highway Terrain)
tyres, the extra void in the pattern improves grip on unsealed surfaces and aids clearing of mud and dirt from the tread surface.
Considerable advances in technologies mean these
tyres can now be used for everyday driving
on the road, with acceptable level of grip and ride comfort. Better tyre designs have improved traction, greater gravel wear resistance and decreased stone retention. Bruise and puncture resistance is supported by multiple full-width steel belts, whilst giving precise steering response and cornering control. Many manufacturers are also using harder tread compounds which provide maximum longevity. This has lead to claims from manufacturers of over 130,000km before the
tyres need replacing.
AT Tyre Models
In this section we have introduced a short list of some popular makes/models along with a review. We invite you to submit reviews for any specific AT tyre that you would like included on this page by using the
Send Feedback form below.
Bridgestone D694
For the best of both worlds, it’s hard to go past the Bridgestone D694 all-terrain tyre. The so-called “Desert Dueller” is now legendary for its ability to master on and off-
road conditions, making it a sound choice for the city dweller that enjoys regular off-road adventures.
Suitable for light truck and recreational vehicles, the D694 offers a block-tread pattern that minimises tread movement to decrease noise and improve handling. Its dual steel-belt construction provides longer life in tough conditions.
Pro Comp All Terrain
Not just a smooth and quiet high performer
on the road, this true all rounder also excels in dirt, rocks and snow. The sipes not only offer flex to the lugs but provide unbelievable traction in
ice and snow winning the prestigious "Severe Weather" rating in USA.
The All Terrain is used widely among mining and forestry applications for its rugged reliability and terrific traction in such a wide range of applications. Also comes with a 80,000 km warranty.
Pirelli Scorpion A/T
The Pirelli Scorpion A/T ranks high for versatility, all-terrain handling and sheer ride comfort.
Its tread design has been formulated to provide maximum traction in mud, snow and gravel, making the Scorpion A/T an excellent choice for gruelling off-road excursions. A robust construction offers high resistance to damage.
Even better, the Scorpion A/T provides exceptional on-road handling, with good driving comfort and low noise.
Cooper AT
The latest 4WD tyre design philosophy is a closed shoulder block to reduce heel and toe wear, and an open centre tread design to self clean when off the road, unlike older designs with sharp, or open tread shoulders for digging. The new Cooper A/T gives good mud and sand traction without compromising wet grip
on the road.
Cooper has a multi-layered steel cord belt and an extra rubber layer fitted between the belts to absorb more impact and reduce damage. Straight Sidewall design also deflects objects and reduces damage. Cooper designs the tyre to give high mileage without tie bars so they grip all through the tread life, making them safer. Tiny sipes or cuts in the tread also add to wet grip because they open as the tyre turns and virtually squeeze the water away.
BF Goodrich T/A KO
With BF Goodrich’s T/A KO, not much has been overlooked in the quest to meet the needs of SUV drivers who demand a lot from their
tyres. The list of features is impressive.
Rim protectors moulded into the lower sidewall of the tyre shelter it from off-road hazards. The T/A KO’s computer-optimised tread design generates less noise. Twin steel belts provide strength and durability.
The T/A KO is a go-anywhere tyre that offers confidence and control for drivers of recreational vehicles.
Tyre Usage Tips
Once you've selected the optimum tyre for your driving usage whether it be HT, AT or MT, you need to understand some basic rules for obtaining maximum longevity from your tyre investment plus you need to observe some safety issues regarding tyre pressures when travelling.
Most tyre manufacturers recommend that 4WD
tyres are rotated every 10,000km (check these specifics with your supplier as warranty conditions may be affected). Rotation is important in a 4WD vehicle because each tyre will wear differently due to breaking, cornering and weight distribution factors. If the vehicle operates in constant 4WD, all wheels are driving wheels, but if not, then whichever are the driving wheels (front or rear wheel drive) will also wear quicker. The more evenly your
tyres wear, the longer life you should achieve. Obviously it goes without saying that tyre pressures should be regularly checked for the same reasons.
When travelling on dirt roads with a heavily loaded vehicle (usually adding weight above the standard vehicle's tyre-rated load capacity), a few important rules need to be observed:
To ease the comfort of the ride and to aid in traction on particularly bad corrugations, it is best to reduce tyre pressures about 4 -6 psi lower than what you run on the bitumen with this same load. Very stony country, such as the
Birdsville Track, can handle even softer tyre pressures. This may not seem to make sense at first, but if you consider that your tyre is just like a balloon being bounced over sharp objects then you can see how the higher pressure would make it more prone to "popping" - termed by tyre manufacturers as stone fractures. This is most common reason for flat
tyres occurring on outback roads and can be easily avoided by reducing tyre pressures.
It is also far preferable to keep speed constant and if possible around 85km/hr over corrugated roads (presuming the road is free from washouts and corners and it would otherwise be safe to do so). You will find that you can "ride" over the worst of the corrugations, provided your tyre pressures are reduced as suggested above. Any faster can be dangerous, slower and the corrugations may shake you and your vehicle to pieces. If handling of your vehicle appears poor, then a good look at
suspension might be prudent. The best indication is "bottoming-out" when travelling as per the above suggested optimums. Most 4WD vehicles do not come with a
suspension system that is rated to handle the load that is carried for extended trips (ie. water, fuel, supplies and spares). The correctly rated
suspension-weight load ratio will also aid in improved tyre wear and longevity.
There is no perfect tyre or tyre pressure and a combination of speed and driver skill (plus a little bit of luck) will be the secret to minimising flat
tyres and maximising tyre wear.
Tyre pressures are best checked when
cool, because hot
tyres give an incorrect reading. And don't forget that
tyres on an off-road trailer can be inflated and deflated to suit conditions as you would your vehicle.
Tyres
This pages provides an index of all content on the site related to Tyres and Rims with thumbnails and summaries of each article, along with links to distributors and manufacturers appearing in our Directory, links to related items for sale/wanted in the Trader, related Forum posts and even related items from the Adventure Shop.
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Topics Index
Each Topic contains a range of detailed and useful articles on products, services and issues. This section is full of practical tips, ideas, photos and factual information. Each topic has links to relevant Manufacturers, Retailers and Operators that can be found in our Directory; plus links to relevant Posts in our Forum; and links to related Trader listings.
Mud Terrain (MT) Tyres
Mud Terrain tyres are not just for hard-core 4WD enthusiats but are generally recommended for drivers who spend at least 80% of their time off-road.
Highway Terrain (HT) Tyres
Highway Terrain tyres are designed to offer the best in road travel conditions with good ride comfort, low noise and freeway speed durability and road handling. Many brand new 4WDs and especially the compact 4WDs are fitted standard with these tyres.
Tyre Size Calculator
Use this page to work out the radius, circumference and diameter of any size tyre. You can also run comparisons between different tyres and work out the differences in size and odometer corrections.
