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CooperDiscoverer Stronghold AT
  • CooperDiscoverer Stronghold AT
  • CooperDiscoverer Stronghold AT
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The Discoverer Stronghold AT is Cooper's Off-Road All-Terrain tire, built for the drivers of pickups, crossovers, and SUVs looking for dependable traction off-road that can still offer some comfort on the pavement. Purpose-built to conquer dirt, gravel, mud, and the challenges of the city streets. It seamlessly blends off-road capability with secure on-road performance and reliable year-round traction. Notably, it handles light snow capably enough to meet the tire industry's severe snow service rating and displays the three-peak mountain snowflake (3PMSF) symbol.

Discoverer Stronghold AT callouts

The Discoverer Stronghold AT's specialized rubber compound forms the base of its next-generation all-terrain tread pattern. This design features tough, interlocking tread blocks for off-road action, while adjusting the individual lug designs for improved tread-life and resistance to irregular wear. The alternating scoop lugs in the shoulders join the distinctive hook sidewall molding to find grip in gravel or loose soil, while stone-ejecting ledges between each block keep rocks from getting lodged in the tread. Deep, circumferential grooves and wide, lateral notches fight against hydroplaning. Alternating textured edges lining the shoulder block interiors create biting edges needed for snow traction when winter strikes.

The internal construction of the Discoverer Stronghold AT consists of a robust, two-ply polyester casing. A single-ply, polyamide reinforcement above two high-strength steel belts further increases durability and handling response, along with providing high-speed stability.

Note: While non-winter tires featuring the three-peak mountain snowflake (3PMSF) symbol may provide additional longitudinal snow traction beyond what all-season (M+S) tires not bearing the symbol can deliver, they do not match the capability of a true winter tire in all adverse weather conditions.

Related Information: What is the three-peak mountain snowflake symbol (3PMSF)?

Tire Rack Test Results Cooper Discoverer Stronghold AT

Taking Off-Road Tires On-Road - 2024 Test 9 – With Winter Update(31:03)

Twelve selections from the On-Road, Off-Road, and Rugged All-Terrain categories comprise this All-Terrain tire test to see how they stack up when it comes to daily driving. A/T tires excel off the beaten path, but what about the rest of the time? The popular aesthetics of this category lead to many using them on their daily drivers. So, what are you sacrificing by choosing these products for your concrete journeys? Noise, comfort, handling, safety, and winter performance are all considered when we test all-terrain off-road tires on the road!



Read the Full Test Report

View All Winter Test Results

Ratings Charts & Reviews CooperDiscoverer Stronghold AT

Tire Category: Off-Road All-Terrain

Consumer Surveys

 
Best in Category
Miles Reported
Recommended
Treadwear
Cooper Discoverer Stronghold AT
Good
93%
396K
7.8 - Good
8.4 - Good
8.9 Dirt Traction
8.3 Sand Traction
8.2 Mud Traction
8.2 Rock Traction
8.6 - Excellent
8.7 Hydroplaning Resistance
8.6 Wet Traction
9.1 - Excellent
9.0 Corner Stability
9.3 Dry Traction
8.9 Steering Response
8.2 - Good
8.6 Light Snow Traction
8.5 Deep Snow Traction
7.6 Ice Traction
8.0 - Good
8.4 Ride Quality
7.6 Noise
8.4 - Good

Cooper Reviews

Customer ratings showcase the Cooper Discoverer Stronghold AT as an excellent off-road all-terrain tire, with outstanding dry traction (frequent 9-10 scores) and confident wet performance highlighted by strong hydroplaning resistance. Winter capabilities earn praise for reliable snow traction, though ice performance shows slight variability. Drivers appreciate its comfortable ride on rugged terrain, though some note increased road noise at higher speeds. Treadwear receives positive feedback overall, with many reporting durable performance in demanding conditions, though a few mention mixed durability experiences. The tire's balanced on-road manners and off-road readiness make it a compelling choice for adventurers seeking versatile all-terrain capability.

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Customers Like:

50 reviews mention "Wet Traction"

  • 47 positive
  • 3 negative

Customers praise the Cooper Discoverer Stronghold AT's wet traction, with most ratings between 8-10. High scores highlight confident grip and reliable hydroplaning resistance, excelling in rugged all-terrain conditions as intended.

December 09, 2024
(Tire Rack Team Member)
4.5 out of 5 Star Rating
4.5 out of 5

I had no issues driving in the wet and was confident in braking and lane changing...

I waited until we had snow to review this tire and have been able to now drive in dry, wet, and snowy conditions...It handles impacts well, I was worried it would be a firmer riding tire, but it absorbed the minor bumps with minimal feedback...I had no issues driving in the wet and was confident in braking and lane changing...I am a sporty driver, and I know this is a truck but it handles any maneuvering I do with ease...So far very happy with the tire, road noise is minimal, handles well in all conditions.

Vehicle: 2014 Chevrolet Silverado 1500 4wd Crew Cab
Miles Driven on Tires: 1,000
Driving Conditions: Combined Highway/City
Location: NILES, MI
Driving Style: Spirited

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August 01, 2025
(Verified Purchase)
4.3 out of 5 Star Rating
4.3 out of 5

...They performed very well on road and in rain. Surprising they did so well in rain. No slipping around...

What a great tire. I wanted something AT like but more quiet on the road and these were nearly silent. They performed very well on road and in rain. Surprising they did so well in rain. No slipping around. What surprised me most was how good they did in snow, ice, and especially offroad in loose dirt with gravel and rock with sand. They actually really shine off road and traction was never an issue. If only they made this tire in 285/65-20 I’d buy a set for my new truck.

Vehicle: 2014 Toyota 4Runner V6 SR5
Miles Driven on Tires: 15,000
Driving Conditions: Combined Off Road/Highway
Location: MONTCLAIR, VA
Driving Style: Spirited

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36 reviews mention "Winter Traction"

  • 34 positive
  • 2 negative

Most customers rate winter traction highly, with many scoring 9s and 10s for excellent snow and deep snow performance. Some note variability in icy conditions (scores 6-8), but overall strong off-road capability in winter.

January 04, 2025
(Verified Purchase)
4.6 out of 5 Star Rating
4.6 out of 5

...These are not true winter tires but have performed admirably in the fresh mountain snow and most recently in the 8-10 inch accumulation we just had on the highway. 4WD is not an idiot pass on snow/ice covered roads, but these were a marked improvement in grip on the pavement...

Put these on just before Montana winter kicked in. I just retired the Hankook Dynapro tires that were almost new when I bought my truck (245/75R16). They were not bald, but beyond my traction needs in the mountains. Stepping up to the Cooper Discovery Stronghold AT (235/85R16) has been a confidence inspiring change. These are not true winter tires but have performed admirably in the fresh mountain snow and most recently in the 8-10 inch accumulation we just had on the highway. 4WD is not an idiot pass on snow/ice covered roads, but these were a marked improvement in grip on the pavement. These are my 1st set of skinny tires, which might be a factor. However, the deep tread death and generous sipes are noteworthy features. While too small to float I have been impressed with the ability to maintain traction in 6+ inches of snow on inclined unmaintained roads.

If you on considering these tires I would HIGHLY recommend.

I cover a generous amount of highway miles. Both interstate and state route highways living in Montana. These are proving to be a great combination of road manners and off pavement traction. Running the dogs in the winter mountains is an enjoyable adventure again. The Hankook tires may have been slightly quieter when newer but cannot compare in traction on loose or slick surfaces. Well done Cooper.

Vehicle: 2014 Toyota Tacoma 4wd Access Cab
Miles Driven on Tires: 1,850
Driving Conditions: Combined Off Road/Highway
Location: STEVENSVILLE, MT
Driving Style: Spirited

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January 19, 2025
5 out of 5 Star Rating
5 out of 5

...Very quiet, and great traction in snow!...

This has been an amazing tire so far! Cooper has been good to me in the past, and this tire is even better than previous. Very quiet, and great traction in snow! I tow 5-6k frequently . 12k miles on them with regular rotations and they look new yet. Buy with confidence.

Vehicle: 2022 Chevrolet Silverado 2500 HD 4WD Crew Cab
Miles Driven on Tires: 12,000
Driving Conditions: Combined Highway/City
Location: EPHRATA, PA
Driving Style: Average

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55 reviews mention "Dry Traction"

  • 54 positive
  • 1 negative

Most customers give dry traction scores of 9-10, praising excellent grip and stability on dry surfaces. High ratings highlight responsive handling and reliable performance, ideal for all-terrain and off-road conditions.

October 02, 2024
5 out of 5 Star Rating
5 out of 5

...feel very good on dry pavement, steering is right on, no feeling of drifting on turns

So far very impressed with my Cooper Discover Stronghold AT 275/65R20 only have 400 miles on them, quite on the road noise, after about 60MPH I do hear some road noise but really nothing, feel very good on dry pavement,
steering is right on, no feeling of drifting on turns, tires are 5lbs less then the Maxxis Razr AT tire so I’m hoping for better MPG still reads the same
They balanced very nice the tech told me, mounted on Impact Off Road 829 Rims. No rain or snow or off-road use yet, but I’ll get there.
The looks are very impressive, also very aggressive tread, side wall pattern looks great too.
2022 Ram 1500 Laramie 2” level kit, S&B CAI, MBRP Exhaust
Update after 2000 miles tires still very impressive, up north in UP MI, gravel roads, soft sandy roads, muddy roads these tires grab very will no slipping at all, rainy roads spot on traction handled
All this condition in 2-wheel drive. Highway speeds 70-75mph in the rain grabbed the road great when accelerating no slipping, hooked up well. MPG still about the same


Vehicle: 2022 RAM 1500 4WD Crew Cab (6 Lug) 275/55-20
Miles Driven on Tires: 2,000
Driving Conditions: Combined Off Road/Highway
Location: NEWPORT, MI
Driving Style: Spirited

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September 20, 2024
4.9 out of 5 Star Rating
4.9 out of 5

...feel very good on dry pavement, steering is right on, no feeling of drifting on turns

So far very impressed with my Cooper Discover Stronghold AT 275/65R20 only have 500 miles on them, quite on the road noise, after about 60MPH I do hear some road noise but really nothing, feel very good on dry pavement,
steering is right on, no feeling of drifting on turns, tires are 5lbs less then the Maxxis Razr AT tire so I’m hoping for better MPG still reads the same
They balance very nice the tech told me, mounted on Impact Off Road 829 Rims. No rain or snow or offroad use yet, but I’ll get there. I live in Michigan
The looks are very impressive, also very aggressive tread, side wall pattern looks great too.
2022 Ram 1500 Laramie 2” level kit,

Vehicle: 2022 RAM 1500 4WD Crew Cab (6 Lug) 275/55-20
Miles Driven on Tires: 500
Driving Conditions: Combined Off Road/Highway
Location: NEWPORT, MI
Driving Style: Spirited

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55 reviews mention "Ride Quality"

  • 50 positive
  • 5 negative

Customers praise the Cooper Discoverer Stronghold AT's smooth ride, with most scoring ride comfort 9s and 10s. Noise levels earn solid 7-10 ratings, performing well for an off-road tire, though a few note higher noise in rugged conditions.

October 17, 2024
(Verified Purchase)
4.3 out of 5 Star Rating
4.3 out of 5

This is a comfortable tire for my diesel truck...

This is a comfortable tire for my diesel truck. Get excellent off road traction and great on the road so far. Have not had on wet roads or on snow yet. But I expect them to do just fine.

Vehicle: 2021 RAM 2500 4WD Crew Cab LT275/70-18 or LT285/60-20
Miles Driven on Tires: 2,000
Driving Conditions: Combined Highway/City
Location: NEWCASTLE, OK
Driving Style: Easy Going

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February 11, 2025
(Tire Rack Team Member)
4.5 out of 5 Star Rating
4.5 out of 5

...Now that I have some miles on the tires I do notice a tire hum or whine at around 70 mph however i think that this is just more noticeable because of no engine noise in the electric truck. I think the motor of an ICE truck would drown out any tire noise...

I have had the opportunity to drive this tire through some pretty heavy Michigan snow and I am happy to report that it performed well above my expectations. If your driving conditions are packed snow and ice I would still recommend a dedicated snow and ice tire but overall this tire felt stable and comfortable in some pretty heavy snow storms. Now that I have some miles on the tires I do notice a tire hum or whine at around 70 mph however i think that this is just more noticeable because of no engine noise in the electric truck. I think the motor of an ICE truck would drown out any tire noise. I would recommend this tire to anyone with a normal truck but I would think twice with an electric truck about AT tires, one of the really special things about an electric truck is the whisper quiet ride.

Vehicle: 2023 Ford F150 Lightning 275/60-20 XL
Miles Driven on Tires: 5,000
Driving Conditions: Combined Highway/City
Location: BARODA, MI
Driving Style: Spirited

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November 12, 2024
(Tire Rack Team Member)
4.3 out of 5 Star Rating
4.3 out of 5

...It rides really nice and has good feel, they balanced out nice and are smooth with no vibration at any speed. The only thing I would appreciate more would be a little less road noise even though its very tolerable this is on a Lightning and that truck is whisper quiet with an highway all season tire on it...

One of the things I most enjoy about this tire is that it has a really nice aggressive tread and sidewall without the extreme noise that you would normally associate with an off road tire. I would not go so far as to say that this tire is quiet but for the level of aggressiveness its a fair trade off. The tire I replaced was the Hankook Dynapro AT2 which although an all terrain is designed more for an on road experience and I like the design of the Cooper much more. It rides really nice and has good feel, they balanced out nice and are smooth with no vibration at any speed. The only thing I would appreciate more would be a little less road noise even though its very tolerable this is on a Lightning and that truck is whisper quiet with an highway all season tire on it. I will say though after a month of driving on them I don't really notice it anymore and I feel like on a ICE truck this would not be much of an issue. I am looking forward to seeing how well they perform in a Michigan snow storm.

Vehicle: 2023 Ford F150 Lightning 275/60-20
Miles Driven on Tires: 1,000
Driving Conditions: Combined Highway/City
Location: BARODA, MI
Driving Style: Spirited

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29 reviews mention "Treadwear"

  • 27 positive
  • 2 negative

Treadwear receives outstanding ratings, with most customers scoring 9s and 10s. High marks highlight excellent durability in rugged off-road use, while scores between 7-8 reflect consistent wear patterns even in demanding all-terrain conditions.

July 04, 2025
(Verified Purchase)
4.7 out of 5 Star Rating
4.7 out of 5

Great tires and wear is awesome!...

Great tires and wear is awesome! Love Cooper tires!!!

Vehicle: 2012 Ford F150 Lariat 2wd Super Cab
Miles Driven on Tires: 10,000
Driving Conditions: All City
Location: DAHLONEGA, GA
Driving Style: Average

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May 17, 2025
4.7 out of 5 Star Rating
4.7 out of 5

...I have about 8000 miles and see no wear...

These tire are great for city driving for an E ply. I ve had them offroad and they do like to grab gravel but what AT doesn't. I absolutely love them in snow and ice, I drive a canyon road for work and they do great. I have about 8000 miles and see no wear. I plan on buying these until they are discontinued.

Vehicle: 2020 GMC Yukon 4WD Denali
Miles Driven on Tires: 8,000
Driving Conditions: Combined Off Road/Highway
Location: PROVO, UT
Driving Style: Spirited

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July 30, 2025
(Verified Purchase)
5 out of 5 Star Rating
5 out of 5

These tires are wearing well...

These tires are wearing well, I love where there is a lot of rain and they handle great in the rain, good in the snow too when we get it. They look good on the truck too.

Vehicle: 2010 GMC Sierra 2500 HD 4wd Crew Cab
Miles Driven on Tires: 10,000
Driving Conditions: Combined Highway/City
Location: RAINIER, OR
Driving Style: Average

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Consumer Reviews

Media Gallery

Taking Off-Road Tires On-Road - 2024 Test 9 – With Winter Update(31:03)

Twelve selections from the On-Road, Off-Road, and Rugged All-Terrain categories comprise this All-Terrain tire test to see how they stack up when it comes to daily driving. A/T tires excel off the beaten path, but what about the rest of the time? The popular aesthetics of this category lead to many using them on their daily drivers. So, what are you sacrificing by choosing these products for your concrete journeys? Noise, comfort, handling, safety, and winter performance are all considered when we test all-terrain off-road tires on the road!



Read the Full Test Report

View All Winter Test Results

Experience the Cooper Discoverer Stronghold AT(00:59)

The Cooper Discoverer Stronghold AT is an Off-Road All-Terrain tire for truck, crossover, and SUV drivers. Fortified to take on dirt, mud, rocks, and sand, it is ready for adventure but maintains moderate on-road comfort to take you to and from the trail.

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