Cooper Discoverer AT3 4S Review

Brand new from the off-road experts at Cooper Tire, the Discoverer AT3 4S is part of an expanded A/T3 lineup.

Lunched alongside the new AT3 LT and AT3 XLT the 4S, as the name suggest, brings with it one important highlight: the ability to deliver impressive traction in the snow.

PROS

  • True winter capability
  • Off-road grip
  • Wet and dry on-road performance and braking
  • Made in the USA

CONS

  • Some compromise on quietness
  • Some drawbacks in overall handling


FEAUTRES

Serrated edges on the treadblocks are a part of what Cooper calls its Snow Groove Technology. According to Cooper the patented “saw-tooth” design traps snow to deliver maximum traction on snowy surfaces.

Designed for all-terrains and weather conditions, the Discoverer AT3 4S can handle more than just snow, which is why the tread also includes AquaVac channels, which run between the treadblocks to help spit out water and prevent aquaplaning.

Additional tread features include the uniquely shaped 5 rows of treadblocks, which are designed to deliver grip on-road and off-road. And finally, yet another feature exclusive to the AT3 4S are new micro zigzag-pattern sipes in each tread block, another telltale sign of winter performance and grip.

cooper tire discoverer at3 4s review

All of these features combine to give the AT3 4S the official rating as a winter capable tire: the three-peak mountain snowflake symbol which can be spotted on the sidewalls.

A more than capable all-terrain tire and one that Cooper rates above the standard A/T3, the 4S does sacrifice some quietness and handling to deliver the specific package that it does. If you’re looking for even more off-road capability, Cooper has more aggressive tires available.

Amazingly, despite the tire’s off-road performance it still manages to have a high UTQG treadware rating of 620.

What Vehicles Will The Cooper Discoverer AT3 4S Fit On?

  • Chevrolet Tahoe, Blazer, Silverado, Trailblazer, Suburban
  • Dodge Durango, Dakota, Ram
  • Ford F-Series, Expedition, Ranger
  • GMC Sierra, Envoy,
  • Jeep Wrangler, Grand Cherokee, Commander, Liberty
  • Nissan Titan, Frontier
  • Ram 1500
  • Toyota 4-Runner, Tundra, Tacoma

 

Cooper Discoverer AT3 4S Price

While retailers offer different prices depending on where you look, the Cooper Tire Discoverer AT3 4S retails for approximately $111 to start. You can also find the latest deals on Cooper Tires here.


Cooper Discoverer AT3 4S Warranty

The Cooper Tire Discoverer AT3 4S comes equipped with a standard limited warranty and an impressive 65,000 mile limited treadwear warranty on euro-metric sizes. That warranty is extremely impressive. It also comes with a free 45-day road test.

Are Cooper AT3 Tires Any Good?

In short, yes, absolutely. Cooper might not be as well known as Michelin or Continental, but they’ve grown to become a tier-one manufacturer, with impressive R&D, and the tires that result from that.

As a brand Cooper is perhaps best known for its truck and SUV tires – all as a result of its Discoverer sub-brand. And in particular, the AT3.

Originally, Cooper made just one AT3 tire. It was extremely well received by critics and consumers alike. As a result, the brand decided to roll out specific versions for more niche truck audiences, with the AT3 4S for year-round performance in colder climates (something Cooper knows about, being based in Ohio), while the AT3 LT is made for trucks and designed for carrying loads, while the AT3 XLT edges closer to being a mud-terrain tire with added grip and sizes specific to lifted pickups (like the Ford Raptor) and Jeeps.

Overall, Cooper consistently performs right at the top amongst its peers, and does so as a slightly lower price point.

Cooper Discoverer AT3 4S Sizes

15-inch tire sizes

235/75R15
235/75R15
265/75R15
225/70R15
255/70R15
265/70R15

16-inch tire sizes
225/75R16
235/75R16
245/75R16
265/75R16
215/70R16
225/70R16
235/70R16
245/70R16
245/70R16
255/70R16
265/70R16

17-inch tire sizes
235/75R17
255/75R17
235/70R17
245/70R17
255/70R17
265/70R17
P285/70R17
235/65R17
245/65R17
255/65R17
265/65R17
235/60R17

18-inch tire sizes
255/70R18
265/70R18
265/65R18
275/65R18
265/60R18

20-inch tire sizes
275/60R20
275/55R20
265/50R20

What Ply Are Cooper Discoverer AT3 4S

The Discoverer AT3 4S has an internal structure made up of two high-strength steel belts with a single-ply nylon layer, wrapped in a two-ply polyester casing. This helps to deliver stability at highway speeds as well as overall durability and tire life. The sidewalls on the tire are a two-ply construction.