Cooper Discoverer AT3 Reviewed in 2021

The Cooper A/T3 All-Terrain radial tire is a superior tire for anyone who is looking for a stylish, well constructed, and well-researched tire, which can handle what you toss at it.

A/T3 stands for, “All-Traction, All-Terrain, All-the-Time”, which in and of itself is quite an ambitious claim for Cooper to make, so let’s just see if this tire can live up to its claim and the expectations of the driver in our review below.

Whether you are a casual driver or a seasoned professional ‘car geek’, as always, we’ve got you covered by giving you a close look at the A/T3, right down to the smallest specification and detail in our Cooper Discoverer AT/3 Review.

Top Sizes Cooper Discoverer AT3


Cooper Discoverer AT3 Reviewed With Features

1. Who is the AT/3 Designed For?

Coopers Discoverer A/T3 All-Terrain tires are geared for those who intend to take their vehicle on and off road, such as campers, beachgoers, or simply folks who want to enjoy long drive through a scenic, dirt road trail.

Cooper Discoverer AT3 Traction Radial Tire
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The A/T3 is classified as a light truck tire, so it works well with owners of sport utility vehicles, jeeps, crossovers and pickup trucks like the Dodge Durango, Chevy Blazer, GMC Sierra or Jeep Wrangler, to name a few. This tire comes in 30 SUV and 32 light truck sizes and is available for rim sized 15 to 20 inches.

As always if you are not clear on specs and sizes, check your vehicle’s manual. If you cannot locate your manual, just do a web search and your manufacturer will have gone online for you to print out. All of these vehicles depend on the all-terrain traction offered by the Discoverer A/T3.

Because of their purpose, size, and weight, these vehicles require a tire that is not only quiet and provides a smooth ride but also gives superior, dependable handling on snowy, wet, and dry roads.

2. Heading 2 Multi faceted Tread Blocks

Now it’s time to take a closer look at the AT/3 and its construction, which include tread blocks. First things first, looking at the sidewall you’ll see the M+S symbol, which tells you that the AT/3 tires are good for any terrain, any season, even winter’s snowy, icy and freezing wet roads. Next, examine the tread block, as it is the tires aggressive shoulder design and multi-faceted tread blocks which give you exceptional steering response and grip on different terrain.

If you are new to tires, a tread block is simply the area of raised rubber that actually hits the road. In order for the AT/3 to be able to handle both on and off-road adventures, it will need interlocking multi-faceted tread blocks, which it has. These multi-faceted tread blocks are what give you the ability for steady handling and solid grip no matter which direction you drive, or what terrain you travel on, from highways to dirt trails or eating up gravel roads, a well designed tread block is what gives you grip.

3. Solid Construction is the Foundation for Greatness

The AT/3 is an all-terrain traction radial tire. Simply put, radial tires use ply cords along with either cord or steel belts to give you long tread life, handling, and protection from punctures.

Cooper Discoverer AT/3 Review
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The description for this particular tire size is 265/70R17, where the ‘R’ represents radial. As for the internal structure, the Discoverer has a 2 ply polyester casing which works to give you that smooth, comfortable ride you’ve come to expect from Cooper tires, with 2 steel belts reinforced by 2 nylon cap plies.

The treads for the AT/3 are made from a chemically coupled silica compound formulated with special additives to toughen them up, give you superior traction and make these tires resistant to damage from street debris, rocks, and gravel than their competitors.

In fact, Cooper uses up to 4 times more silica than its closest competitors. The sidewalls are made from a 2 ply polyester, while the tread construction is 1 ply nylon, 2 ply steel and 2 ply polyester.

4. Tread Design

The grooves you see and the pattern they form are what keep you on the road, and these spaces between the tread blocks are usually called tread voids. It is their design, depth, and width which allow the tread blocks to be flexible, grip, and evacuate water which reduces hydroplaning. For example, it’s Coopers own Snowgroove technology that gives you the traction you need to drive through the winter snow.

The AT/3’s offer you excellent traction, Cooper themselves certify that they provide 60% traction on-road and sand, with 40% traction 40% for dirt and mud. It’s their unique, symmetric, 5 rib tread pattern which makes for the large, aggressive tire which holds its own on off-road trails. Looking at the tire, you’ll notice that the middle rib is divided, which gives it the off-road traction that you need without taking away from it’s on-road performance capabilities.

We mentioned the importance of tread voids, and as you are paying top dollar for tires with certain performance characteristics enhanced by these grooves, it is to your best advantage to keep them clear of stones, and other debris. To prevent small stones, rocks, and cinders from betting caught up in between the treads, Cooper developed an anti-stone retention design. This self-cleaning ability is made possible with saw-tooth grooves that work with serrated steps to help loosen any small stones, which keeps your grip on the road secure.

5. Features Specific to the Discoverer A/T3 265/70R17

As this review is for the A/T3 265/70R17 traction radial tire, it is important to go into detail on the specifications and features so you can compare them with the specs in your vehicles manual.

Cooper Discoverer AT3 Traction Radial Tire
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To begin with, let’s make sure that you have the right wheel size. For this particular tire, the wheel diameter is 17 inches, the sidewall style is outline, the tire diameter range is 31 to 31.99 inches, the tire diameter is 31.43 inches.

Section width will be 10.68 inches with a tread width of 8.26 inches. The minimum recommended wheel width is 7 inches and the maximum recommended wheel width is 9.

The speed rating is T, load index 115, tread depth 14/32 inches and the maximum load for a single tire is 2679 pounds. When purchasing any tire for your vehicle, the specs must match up with the information your manufacturer provided.

Pros & Cons of this Product

  • Excellent traction in wet, dry and snowy road conditions
  • Fantastic grip on off-road terrain
  • You get a nice, quiet and smooth ride
  • Anti-stone retention design prevents rock, cinders and gravel from being lodged in treads
  • Snowgroove technology for secure winter driving
  • May need improvement to handle icy roads

Frequently Asked Questions (FAQs)

1. Are these tires good for mudding competitions such as mudders? 

The AT3 are superb all-terrain tires that will serve you well in rainy, dry, and snowy road conditions. However, if you are looking for a competitive tire to run mudders, steep rocky trains, or simply drive through heavily mudded areas competitively, this would not be the tire for those purposes, especially for rock performance, as the tread is not flexible enough. If this is what you are seeking, think of purchasing the Discoverer S/T MAXX instead.

2. Does this tire have a warranty, if so what type? 

These tires are approved by the Department of Transportation and have a 55,000-mile tread life warranty. Cooper also provides you with several other guarantees such as a 2/32 inch tire uniformity guarantee, and materials/workmanship have a 5-year guarantee.

3. How do these tires rank on ice? 

They are all-terrain, which means they work well on loose dirt, mud, and gravel. They are all-weather, so do well in wet, dry, and are outstanding performers in the snow. However, according to some users, while you can handle the car on ice, they feel the tire design needs improvement for superior handling on ice.

The Final Words (Summary)

The tire speaks for itself, and the users agree: The Discoverer AT3 all-terrain tire is a superior choice for people who drive light trucks/SUVs and value excellence in handling through various terrains and weather conditions.

The silica-based tread compound and aggressive 5 rib tread design work together to give you driving comfort while you easily navigate curves and corners. Wet traction is improved and rolling resistance is diminished, while lateral groove protectors help keep those pesky cinders, stones, and chips from getting lodged in your tires.

As you can see by reading our Cooper Discoverer AT3 Review, this is not a bad choice if you are looking for an affordable tire that can handle on and off road driving in any season.

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