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Cooper Discoverer AT3 XLT vs Toyo Open Country A/T III

Cooper Discoverer AT3 XLT vs Toyo Open Country AT3 [2024]

Here are the key stats for the Cooper Discoverer AT3 XLT and Toyo Open Country A/T III tyres, at a glance.
Discoverer AT3 XLTOpen Country A/T III
Vehicle SuitabilityLight Truck / SUVLight Truck / SUV
Driving StyleOn-/Off-Road All-TerrainOn-/Off-Road All-Terrain
SeasonAll SeasonAll Season
Release Date20182020
Run Flat?NoNo
Overall Score84/10086/100

Pricing

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Cooper Discoverer AT3 XLT vs Toyo Open Country A/T III in Australia

The Discoverer AT3 XLT has been around in Australia for about 6 years, whereas the Open Country A/T III has been on the market for about 4 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

We've analysed results of the following tyre benchmarks to make data-driven comparison of the Discoverer AT3 XLT and the Open Country A/T III tyres.

  • TireRack: Best in On-Road All-Terrain
  • The Best All-Terrain Tires for North America in 2023/24 by TiresVote
  • TireRack: Best in Off-Road All-Terrain
  • The Best All-Terrain Tires for North America in 2023/24 by TiresVote
  • Tyre Reviews: All-Terrain Tire Test R18
  • Consumer Reports: All Terrain Truck Tires

Benchmark Test Data

Here are the results from a number of magazine tests and benchmarks done on the Discoverer AT3 XLT and Open Country A/T III tyres.
Discoverer AT3 XLTOpen Country A/T III
Dry PerformanceExcellentExcellent
Wet PerformanceExcellentExcellent
ComfortExcellentExcellent
Snow/Ice PerformanceGoodExcellent
HandlingN/AExcellent
Price/QualityN/AExcellent
Overall Score84/10086/100

Comfort

Based on the results of a number of tyre benchmarks, the Discoverer AT3 XLT scores 5 out of 5 for comfort and the Open Country A/T III scores 5 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 XLTOpen Country A/T III
Treadwear620600
Traction
(AA - C)
AA
Temperature Resistance
(A - C)
BB

Treadwear

As per the UTQG guidelines, the Discoverer AT3 XLT tyres have a treadwear rating of 620, whereas the Open Country A/T III tyres have a rating of 600. This means that the Discoverer AT3 XLT tyres will theoretically last 1.0 times as long as the Open Country A/T III 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.

As per the UTQG system, the Discoverer AT3 XLT tyres have a traction grading of A, whereas the Open Country A/T III tyres have a grading 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.

As per the UTQG system of tyre grading, the Discoverer AT3 XLT tyres have a temperature resistance grading of B, whereas the Open Country A/T III tyres have a grading of B (on a scale of A, B, C).

Warranty

In terms of distance, the Discoverer AT3 XLT tyres have a warranty of 80,000 kilometres. There is no distance based warranty available for the Open Country A/T III.

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 XLT tyres get a score of 84 out of 100, while the Open Country A/T III tyres get a score of 86 out of 100.

The Discoverer AT3 XLT tyres have a UTQG treadwear rating of 620, whereas the Open Country A/T III tyres have a rating of 600.This means that you can expect the Discoverer AT3 XLT to last 1.0 times as long as the Open Country A/T III tyres.

The Discoverer AT3 XLT have a UTQG traction grading of A, while the Open Country A/T III tyres having a grading of A.

The Discoverer AT3 XLT have a UTQG temperature grading of B, while the Open Country A/T III tyres having a grading of B.

Full Size List (click to show)

Below is a list of all 27 sizes of the Discoverer AT3 XLT, and all 96 sizes of the Open Country A/T III tyres sold in Australia, sorted by tyre width.

Discoverer AT3 XLT Sizes

Size
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

Open Country A/T III Sizes

Size
215/70 R16 100T
215/75 R15 100T
215/65 R16 102T XL
215/85 R16 115/112Q
215/65 R17 103T XL
225/70 R16 103T
225/75 R16 115/112Q
225/55 R18 102H XL
225/60 R17 103T XL
225/65 R17 102T
225/75 R15 102T
225/75 R16 104S
225/60 R18 104T XL
235/80 R17 120/117R
235/75 R15 104/101S
235/65 R18 110T XL
235/60 R18 107T XL
235/65 R17 108H XL
235/75 R15 108T XL
235/75 R17 108S
235/70 R16 106T
235/85 R16 120/116R
245/60 R20 107T
245/70 R16 106S
245/70 R17 110T
245/75 R17 121/118S
245/70 R17 119/116R
245/75 R16 111T
245/50 R20 105H XL
245/75 R16 120/116S
245/65 R17 111T XL
245/60 R18 109T XL
255/70 R17 112T
255/60 R19 113H XL
255/55 R20 110H XL
255/70 R16 115T XL
255/65 R16 109T
255/50 R20 109T XL
255/55 R18 109H XL
255/80 R17 121/118R
255/70 R18 113T
255/55 R19 111H XL
265/65 R18 114T
265/70 R16 111T
265/75 R16 123/120R
265/65 R17 116T XL
265/60 R18 110T
265/60 R20 121/118S
265/75 R16 116T
265/75 R15 112S
265/70 R17 115T
265/70 R18 124/121Q
265/70 R17 121/118S
265/70 R18 116T
265/50 R20 111T XL
275/55 R20 117T XL
275/65 R20 126/123S
275/65 R18 123/120S
275/65 R18 116T
275/65 R18 113/110T
275/60 R20 115T
275/70 R18 125/122S
285/75 R17 117/114Q
285/55 R22 124/121S
285/75 R16 126/123R
285/55 R20 122/119T
285/65 R18 125/122S
285/70 R17 116/113Q
285/60 R20 125/122R
285/50 R22 121/118R
285/75 R18 129/126S
285/55 R20 114T
285/70 R17 117T
285/75 R17 121/118S
285/45 R22 114H XL
285/60 R18 120S XL
285/70 R17 121/118S
295/55 R20 123/120T
295/50 R22 122/119T
295/55 R22 125/122T
295/60 R20 126/123S
295/65 R20 129/126S
295/70 R18 129/126S
295/75 R16 128/125R
305/70 R16 124/121R
305/50 R20 120T XL
305/45 R22 118S XL
305/55 R20 125/122Q
305/65 R18 128/125Q
305/70 R17 121/118R
315/75 R16 127/124R
315/70 R17 121/118S
325/65 R18 127/124R
325/50 R22 127Q
325/60 R18 124/121S
325/60 R20 126/123R
Louis from Tyre Geek

Louis

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