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Cooper Discoverer AT3 4S vs Cooper Discoverer AT3 LT

Cooper Discoverer AT3 4S vs AT3 LT - Test Data

Here are the key stats for the Cooper Discoverer AT3 4S and Cooper Discoverer AT3 LT tyres, at a glance.
Discoverer AT3 4SDiscoverer AT3 LT
Vehicle SuitabilityLight Truck / SUVLight Truck / SUV
Driving StyleOn-/Off-Road All-TerrainOn-/Off-Road All-Terrain
SeasonAll SeasonAll Season
Release Date20182018
Run Flat?NoNo
Overall Score87/10076/100

Pricing

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Cooper Discoverer AT3 4S vs Cooper Discoverer AT3 LT in Australia

The Discoverer AT3 4S has been around in Australia for about 6 years, whereas the Discoverer AT3 LT has been on the market for about 6 years

Both tyres are rated for on-/off-road all-terrain action. Both tyres are designed for use with 4WDs, SUVs and light trucks.

Both of these are considered all season tyres. Neither of them are runflat tyres. Both brands are considered to be in the mid-range part of the market.

Read on to see how each of these tyres stack up against each other!

How We Reviewed These 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 41 sizes of these tyres by the European Union.

Fuel Efficiency

EU Grade
(A - E)
Compared to an A grade tyre?
Discoverer AT3 4SD0.3L/100km extra fuel consumption. ~$72 extra per year
Discoverer AT3 LTE0.4L/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 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).

The Discoverer AT3 LT tyres get a grade of E

Expect the lower grade tyre to consume an extra 0.1L/100km. This works out to $24 extra spent on petrol per year, based on a typical 12,000 km driven per year.

Here's a graph comparing the Discoverer AT3 4S and Discoverer AT3 LT tyres for fuel efficiency (1 = Grade E, 5 = Grade A).

Grip & Handling

EU Grade
(A - E)
Compared to an A grade tyre?
Discoverer AT3 4SC5 metre greater stopping distance when braking at 80km/h
Discoverer AT3 LTC5 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.

The Discoverer AT3 LT tyres, on the other hand, get a grade of C.

As their wet grip grade is the same, expect negligible differences in terms of braking distance.

Here's a graph comparing the Discoverer AT3 4S and Discoverer AT3 LT tyres for wet grip (1 = Grade E, 5 = Grade A).

Noise

EU Grade
(A - C)
Compared to an A grade tyre?
Discoverer AT3 4SB (72.8 dB)2 times as noisy
Discoverer AT3 LTB (73.0 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.

On the other hand, the Discoverer AT3 LT tyres produce 73.0 dB of road noise, which means a grade of B.

As their noise grade is the same, don't expect many differences in terms of cabin noise.

Here's a visual representation of how the Discoverer AT3 4S and Discoverer AT3 LT tyres stack up for noise (1 = Grade C, 3 = Grade A).

Comfort

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

UTQG Data

Introduced by the National Highway Traffic Safety Administration (NHTSA) in the USA, the Uniform Tire Grading System (UTQG), is a system for comparing one tyre product to another on the basis of some standardised tests.

Discoverer AT3 4SDiscoverer AT3 LT
Treadwear620
Traction
(AA - C)
A
Temperature Resistance
(A - C)
B

Treadwear

The Discoverer AT3 4S tyres have a treadwear rating of 620, which means that they would last 6.2 times longer than a tyre with a rating of 100. There's no treadwear data available for the Discoverer AT3 LT tyres.

Traction

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.

The Discoverer AT3 4S tyres have a traction grade of A (on a scale of AA, A, B, C). There's no UTQG traction grading data available for the Discoverer AT3 LT tyres.

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.

The Discoverer AT3 4S tyres have a temperature resistance grade of B (on a scale of A, B, C). There's no UTQG temperature resistance grading data available for the Discoverer AT3 LT tyres.

Warranty

In terms of distance, the Discoverer AT3 4S tyres have a guarantee of 80,000 kilometres, whereas the Discoverer AT3 LT tyres have a guarantee of 80,000 kilometres.

Comparisons With Similar Tyres

Still on the fence about these tyres? Check out how they compare to other similar tyres on the market in Australia!

Summary

Let's now take a look at the main differences between these two sets of tyres.

All in all, the Discoverer AT3 4S tyres get a score of 87 out of 100, while the Discoverer AT3 LT tyres get a score of 76 out of 100.

For fuel efficiency, Discoverer AT3 4S score a grade of D, which is below average. Discoverer AT3 LT end up with a grade of E, which is very poor.

More important is the wet grip, which gives you an indication of their traction and handling. In this regard, Discoverer AT3 4S get a score of C, which is more or less average. Discoverer AT3 LT end up with a grade of C, which is more or less average.

More important is the wet grip, which gives you an indication of their traction and handling. In this regard, Discoverer AT3 4S get a score of B, which is about typical. Discoverer AT3 LT end up with a grade of B, which is about typical.

In terms of a distance guarantee, the Discoverer AT3 4S are guaranteed for 80,000 kilometres, while the Discoverer AT3 LT tyres are guaranteed for 80,000 kilometres.

Full Size List (click to show)

Below is a list of all 42 sizes of the Discoverer AT3 4S, and all 20 sizes of the Discoverer AT3 LT tyres sold in Australia, sorted by tyre width.

Discoverer AT3 4S Sizes

Size
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

Discoverer AT3 LT Sizes

Size
215/85 R16 115/112R
225/75 R16 115/112R
225/75 R17 116/113R
235/80 R17 120/117R
235/85 R16 120/116R
245/70 R16 118/115R
245/75 R17 121/118S
245/70 R17 119/116S
245/75 R16 120/116R
265/65 R17 120/117R
265/75 R16 123/120R
265/70 R17 112/109S
265/70 R16 121/118R
265/70 R17 121/118S
265/60 R18 119/116S
265/65 R18 122/119R
265/75 R16 112/109R
275/70 R17 121/118R
275/65 R18 123/120S
285/65 R17 121/118S
Louis from Tyre Geek

Louis

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