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Cooper Discoverer AT3 XLT

Cooper Discoverer AT3 XLT Review - Buy Or Avoid? [Test Data]

Here are the key stats for the Discoverer AT3 XLT, at a glance.
Key Info - Australia
Vehicle SuitabilityLight Truck / SUV
Driving StyleOn-/Off-Road All-Terrain
SeasonAll Season
Release Date2018
Run Flat?No
Overall Score84/100


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 XLT 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 27 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 XLT 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 1 sizes of the Discoverer AT3 XLT 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)
E0.4L/100km extra fuel consumption. ~$96 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 XLT tyres rank a E 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 0.4L/100km. This works out to $96 extra spent on petrol per year, based on a typical 12,000 km driven per year.


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

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

Grip & Handling

EU GradeCompared to an A grade tyre?
Wet Grip
(A - E)
D7.5 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 XLT tyres rank a D 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 7.5 metres to come to a complete stop when braking at 80km/h.


Here's how the Discoverer AT3 XLT 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 XLT tyres produce 73.0 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 XLT 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 XLT scores 5 out of 5 for comfort.

  • TireRack: Best in On-Road All-Terrain
  • The Best All-Terrain Tires for North America in 2024 by TiresVote


With a UTQG treadwear rating of 620, the Discoverer AT3 XLT 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 XLT 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 84 out of 100, the Discoverer AT3 XLT 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 E, which is very poor, 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 D, which is below 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 27 sizes of the Discoverer AT3 XLT tyres sold in Australia, sorted by tyre width. Select your preferred size to compare prices across multiple suppliers.

265/70 R18 124/121S
265/60 R20 121/118R
275/55 R20 120/117S
275/70 R18 125/122S
275/60 R20 123/120S
275/65 R20 126/123S
285/75 R18 129/126S
285/65 R18 125/122S
285/75 R16 126/123R
285/65 R20 127/124S
285/70 R17 121/118S
285/60 R20 125/122S
285/55 R20 122/119R
285/75 R17 121/118S
295/60 R20 126/123S
295/70 R18 129/126S
295/75 R16 128/125R
295/70 R17 121/118R
305/55 R20 121/118S
305/70 R16 124/121R
305/70 R17 121/118R
305/65 R18 124/121S
315/70 R17 121/118S
315/75 R16 127R
325/60 R18 124/121R
325/60 R20 126/123R
325/65 R18 127/124R
Louis from Tyre Geek


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