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Cooper Discoverer AT3 4S

Cooper Discoverer AT3 4S Review - Good Option? [Test Data]

Here are the key stats for the Discoverer AT3 4S, at a glance.
Key Info - Australia
Vehicle SuitabilityLight Truck / SUV
Driving StyleOn-/Off-Road All-Terrain
SeasonAll Season
Release Date2018
Run Flat?No
Overall Score87/100


Enter your tyre size below to see the best prices for your specific size (if unsure, check placard on the driver's side door or your existing tyres).

Cooper Discoverer AT3 4S in Australia

This offering by Cooper has been around in Australia for about 6 years. Especially designed for 4WDs, SUVs and light trucks, it comes in a total of 42 sizes.

This on-/off-road all-terrain tyre is a solid option for those looking for an all season tyre in the mid-range of the market. Note that it is not a runflat tyre.

Read on to see how it stacks up against the competition!

How We Reviewed The Discoverer AT3 4S Tyres

Unlike the Australian government, the European Union carries out standardised tests on all tyres sold in Europe. These tests are carried out in identical conditions, making them a reliable way to compare tyres.

For this review, we use averaged results from tests done on 25 sizes of the Discoverer AT3 4S tyres by the European Union.

We then compare these to the same results for the following similar tyres, also rated for On-/Off-Road All-Terrain usage and sold in Australia.

Fuel Efficiency

EU GradeCompared to an A grade tyre?
Fuel Efficiency
(A - E)
D0.3L/100km extra fuel consumption. ~$72 extra per year

The US Department of Energy estimates that around 25% of the fuel consumption of a vehicle is attributable to the tyres. That's a lot, and it means that choosing fuel efficient tyres can save you quite a bit of money.

The Discoverer AT3 4S tyres rank a D on a scale of A to E in the official fuel efficiency tests carried out by the EU (they call these rolling resistance tests).

Relative to an A grade tyre, expect to use an extra 0.3L/100km. This works out to $72 extra spent on petrol per year, based on a typical 12,000 km driven per year.


Here's how the Discoverer AT3 4S compares to similar tyres for fuel efficiency (1 = Grade E, 5 = Grade A).

Based on the comparison tyres we've selected, the Discoverer AT3 4S ranked # out of 0 tyres.

Grip & Handling

EU GradeCompared to an A grade tyre?
Wet Grip
(A - E)
C5 metre greater stopping distance when braking at 80km/h

We'll now take a look at how these tyres compare in terms of grip and handling.

A good measure of this is 'wet grip', which is an indication of how well the tyres will allow the vehicle to come to a stop in wet conditions.

The Discoverer AT3 4S tyres rank a C on a scale of A to E in the official fuel tests carried out by the EU.

Relative to an A grade tyre, expect these tyres to require about an extra 5 metres to come to a complete stop when braking at 80km/h.


Here's how the Discoverer AT3 4S compares to similar tyres for wet grip (1 = Grade E, 5 = Grade A).

For wet grip, they scored # out of 0 comparison tyres.


EU GradeCompared to an A grade tyre?
(A - C)
B (73 dB)2 times as noisy

Another key factor to consider when choosing a tyre is road noise. Once you're over about 40 km/h, the dominant source of noise you hear is from the contact of your tyres on the road.

There is a surprisingly wide variation in the amount of noise each tyre makes.

The Discoverer AT3 4S tyres produce 72.8 dB of road noise, which corresponds to a rank of B on a scale of A to C in the standardised testing done by the EU.

Expect these tyres to produce about 2 times as much noise as an A grade tyre (the decibel scale is logarithmic).


Here's how the Discoverer AT3 4S compares to similar tyres for noise (1 = Grade C, 3 = Grade A).

For noise, they ranked # out of 0 comparison tyres.


Based on the results of a number of tyre benchmarks, including those below, the Discoverer AT3 4S scores 5 out of 5 for comfort.

  • The Best All-Terrain Tires for North America in 2024 by TiresVote
  • TireRack: Best in On-Road All-Terrain
  • Consumer Reports: All Terrain Truck Tires
  • Amazon: Best Sellers in All-Terrain & Mud-Terrain Tires


With a UTQG treadwear rating of 620, the Discoverer AT3 4S would theoretically last 6.2 times longer than a tyre with a treadwear rating of 100.


The UTQG system measures traction as straight-line braking in dry conditions. The scale is AA, A, B, C, with AA being the best grade, and C the worst.

These tyres score a grade of A.

Temperature Resistance

The UTQG temperature resistance tests measure how well tyres can dissipate heat that builds up due to friction with the road. The scale is A, B, C, with A being the highest grade.

These tyres score a grade of B.


The Discoverer AT3 4S tyres have a warranty of 80,000 kilometres.

Comparisons With Similar Tyres

Still undecided as to whether to go with these on-/off-road all-terrain tyres? Check out our data-driven comparisons to similar tyres on the market in Australia!


With an overall rating of 87 out of 100, the Discoverer AT3 4S tyres are a solid choice for anyone looking to replace their SUV or truck rubber with some tyres designed for on-/off-road all-terrain action.

For fuel efficiency, they score a grade of D, which is below average, though this isn't a super important factor.

More important is the wet grip, which gives you an indication of their traction and handling. In this regard, they get a score of C, which is more or less average.

Finally, for road noise, they receive a B grade, which is about typical.

In terms of data out of the US, they have the following UTQG ratings:

  • Treadwear: 620
  • Traction: A (scale: AA, A, B, C)
  • Temperature Resistance: B (scale: A, B, C)

Full Size List (click to show)

Below is a list of all 42 sizes of the Discoverer AT3 4S tyres sold in Australia, sorted by tyre width. Select your preferred size to compare prices across multiple suppliers.

215/70 R16 100T
215/65 R17 99T
225/70 R15 100T
225/75 R16 104T
225/70 R16 103T
225/65 R17 102H
235/75 R15 109T XL
235/70 R17 109T XL
235/75 R15 105T
235/60 R17 102T
235/65 R17 108T XL
235/75 R16 108T
235/70 R16 106T
235/75 R17 109T
245/65 R17 111T XL
245/75 R16 111T
245/70 R16 111T XL
245/70 R16 107T
245/70 R17 110T
255/70 R18 113T
255/50 R20 109H XL
255/75 R17 115T
255/65 R17 110T
255/70 R17 112T
255/70 R16 111T
255/70 R15 108T
265/70 R15 112T
265/65 R17 112T
265/70 R16 112T
265/50 R20 111T XL
265/75 R15 112T
265/70 R18 116T
265/75 R16 116T
265/60 R18 110T
265/65 R18 114T
265/70 R17 115T
275/65 R18 116T
275/45 R22 112H XL
275/60 R20 115T
275/55 R20 117T XL
285/70 R17 117T
285/45 R22 114H XL
Louis from Tyre Geek


I'm Louis, an engineer passionate about helping Australians choose better tyres for their vehicles!