Tests – · 1 test Owners 84 · 688 reviews
Best test result: #5 of 18 in 2022 Consumer Reports All Terrain Truck Tires (tested tread life (miles))
“Got some 225/75/16 Cooper Discoverer AT3 4s - Great fit on stock setup.”
Head-to-head
Updated
Cooper Discoverer AT3 4S vs Toyo Open Country All Terrain — Compared
Relative Score (0–100): the weighted average of the categories below, each 60% road tests and 40% owner reviews (comfort 40/60). Based on 1 + 0 road tests and 688 + 16 owner reviews. How we score
Discoverer AT3 4S is ahead, 80–66
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Tests – · none yet Owners 64 · 16 reviews
Category by category
Relative Score per category, 0–100. Open “Why this score” for the tests and owner ratings behind it.
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82
Dry
Discoverer AT3 4S +1765Why this score
Source Discoverer AT3 4S Open Country All Terrain Professional tests (TWG score) ≈ 77 (est.) ≈ 66 (est.) Reviews found online 89 63 Discoverer AT3 4S: 60% × 76.8 (est.) + 40% × 88.8 = 82
Open Country All Terrain: 60% × 66 (est.) + 40% × 63.1 = 65
No road tests of dry for Discoverer AT3 4S. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.42).
No road tests of dry for Open Country All Terrain. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.42).
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86
Wet
Discoverer AT3 4S +1868Why this score
Source Discoverer AT3 4S Open Country All Terrain Professional tests (TWG score) ≈ 82 (est.) ≈ 69 (est.) Reviews found online 91 67 Discoverer AT3 4S: 60% × 81.9 (est.) + 40% × 90.9 = 86
Open Country All Terrain: 60% × 68.7 (est.) + 40% × 67.1 = 68
No road tests of wet for Discoverer AT3 4S. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).
No road tests of wet for Open Country All Terrain. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).
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73
Snow
Discoverer AT3 4S +964Why this score
Source Discoverer AT3 4S Open Country All Terrain Professional tests (TWG score) ≈ 72 (est.) ≈ 66 (est.) Reviews found online 75 59 Discoverer AT3 4S: 60% × 72.4 (est.) + 40% × 75 = 73
Open Country All Terrain: 60% × 66.5 (est.) + 40% × 59.3 = 64
No road tests of snow for Discoverer AT3 4S. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.37).
No road tests of snow for Open Country All Terrain. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.37).
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80
Comfort
Discoverer AT3 4S +1565Why this score
Source Discoverer AT3 4S Open Country All Terrain Professional tests (TWG score) ≈ 72 (est.) ≈ 68 (est.) Reviews found online 86 64 Discoverer AT3 4S: 40% × 72.2 (est.) + 60% × 85.8 = 80
Open Country All Terrain: 40% × 68.1 (est.) + 60% × 63.6 = 65
No road tests of comfort for Discoverer AT3 4S or Open Country All Terrain. The test half is the tested tires’ average (69): owners’ comfort ratings barely follow the road tests.
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73
Noise
No comparison–Why this score
Source Discoverer AT3 4S Open Country All Terrain Professional tests (TWG score) ≈ 67 (est.) – Reviews found online 84 – Discoverer AT3 4S: 60% × 66.6 (est.) + 40% × 83.5 = 73
No road tests of noise for Discoverer AT3 4S. The test half is the tested tires’ average (67): owners’ noise ratings barely follow the road tests.
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75
Treadwear
Discoverer AT3 4S +867Why this score
Source Discoverer AT3 4S Open Country All Terrain Professional tests (TWG score) · 1 / – tests 71 ≈ 66 (est.) Reviews found online 80 67 Discoverer AT3 4S: 60% × 71.1 + 40% × 79.6 = 75
Open Country All Terrain: 60% × 66.4 (est.) + 40% × 66.8 = 67
No road tests of treadwear for Open Country All Terrain. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.35).
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81
Handling (owners)
Discoverer AT3 4S +1863Why this score
Source Discoverer AT3 4S Open Country All Terrain Reviews found online 81 63
Scores at a glance
| Category | Cooper Discoverer AT3 4S | Toyo Open Country All Terrain |
|---|---|---|
| Relative Score | 80 | 66 |
| Dry | 82 | 65 |
| Wet | 86 | 68 |
| Snow | 73 | 64 |
| Comfort | 80 | 65 |
| Noise | 73 | – |
| Treadwear | 75 | 67 |
| Handling (owners) | 81 | 63 |
Higher is better. The Relative Score follows your weights below; category scores do not change.
Weight the categories that matter to you
Wet grip starts at “Important”. Treadwear starts at “Neutral” here: road tests measured it for at most one of the two tires, so it rests on owner reviews. Move the sliders and the scores update instantly.
Important
NotLessNeutralImportantMost
Important
NotLessNeutralImportantMost
Neutral
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost
Only one of the two tires has a score here, so this weight changes nothing in the head-to-head.
Neutral
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost
Recomputed
Headline score
80
/ 100
Discoverer AT3 4S
66
/ 100
Open Country All Terrain
Only categories both tires have data for count toward the headline score.
Pros, cons & observations
Themes extracted from owner reviews found online — not the opinion of TireWheelGuide.
Tire A Discoverer AT3 4S
Pros
- Exceptionally quiet and smooth on-road ride compared to typical all-terrain tires
- Superb traction in wet, rainy, and deep winter snow conditions
- Strong value and competitive pricing relative to performance and lifespan
Cons
- Potential for accelerated tread wear under heavy off-road use or demanding mountain driving
- Occasional reports of balancing issues or out-of-round tires requiring multiple adjustments
- Minor fuel economy drop or increased rolling resistance when switching from standard highway tires
Tire B Open Country All Terrain
Pros
- Exceptional performance and traction in deep snow and winter conditions
- Impressive tread life and overall longevity with proper maintenance
- Low road noise and high comfort levels during normal highway driving
Cons
- Subpar grip and traction in wet road conditions reported by some users
- Vulnerability and poor durability regarding sidewall damage
- Relatively high purchase price compared to competitors or perceived value
What real owners are saying
From Reddit, forums and review threads. Not part of our score
Tire A
Positive
Cooper Discoverer AT3 4S
Community sentiment for the Cooper Discoverer AT3 4S is predominantly positive, with drivers praising its quiet highway ride, strong traction across snow, rain, and dry pavement, and appealing appearance. Several owners note that while it handles light off-road duties and daily driving well, tread life occasionally falls short of mileage expectations. In addition, multiple posts highlight frustration and concern regarding availability and recent discontinuation across various sizes.
r/DubaiPetrolHeads
·1 upvote ·2026-01-20
“Cooper Discoverer AT3 4s I am struggling to find Cooper Discoverer AT3 4s tyres with size 265/70/17. There seemed to be an acute shortage in the market. I am not keen on BF Goodrich due to the weight and price. I shall appreciate it if anyone with reliable leads for Cooper tyres. What else do you recommend if Cooper is just not realistically available? I can wait till March before I need to get my car tested for renewal of registration. TIA.”
r/JeepRenegade
·6 upvotes ·2020-08-24
“New tires: Cooper Discoverer AT3 4S Needed a 3PMSF tire and these Coopers edged out the Wildpeak AT3Ws based on wear rating and highway performance. Also, Cooper has a promo right now for a $70 mail in rebate. MPG has been about the same, maybe slightly better. Visually, I like them, more rugged than the stock Falkens. Highway and forest road driving has been solid. Stock size, 215/65R17, on a 2020 TH: Read more”
ramforum.com
·2023-01-27
“Installed new Cooper Discoverer AT3 4s tires on my 1500 today. Took off a set that I put on three years ago when the stock tires wore out. I think I got good performance from the first set, but they didn't last as long as I would have hoped. They were getting pretty close to the wear bars, so had some life left. The guy at the tire shop estimated that I would get another 10000 miles out of them. They had a little less than 40 K miles. We got a bit of snow here this week, and I could tell that they were not gripping nearly as well as they did before. If it was spring/summer, they would have stayed on the truck. I will be driving to Maine next week, pulling a snowmobile trailer, so I decided that it was time to buy now, rather than risking a wreck. New tires look similar to the old ones. Still made in USA (good), no longer available with white letters, black wall only, in cast that is important to you.”
Top themes
#Snow and wet traction#Quiet highway ride#Tread life and longevity#Discontinuation and availability#Comfortable ride quality#Mild off-road performance
Based on 27 community posts
Tire B
Toyo Open Country All Terrain
We haven't collected enough community discussion about this tire yet.
Specs side by side
| Attribute | A · Cooper Discoverer AT3 4S | B · Toyo Open Country All Terrain |
|---|---|---|
| Category | All-Terrain tire | All-Terrain tire |
| Vehicle type | SUV and 4x4 | SUV and 4x4 |
| Sizes available | 14 | — |
| Rim diameters | 15″ – 22″ | — |
| Tread depth | 12 - 14/32″ | — |
| UTQG | 620 A B | — |
| Treadwear warranty | 65,000 mi | — |
| Sidewall | Black Side Wall - Raised Outline White Lettering | — |
| Max pressure | 44 - 50 psi | — |
Which one should you actually buy?
80
/ 100
Cooper Discoverer AT3 4S
66
/ 100
Toyo Open Country All Terrain
Winner: Cooper Discoverer AT3 4S — better wet, handling and dry. It leads or ties in every category we score. Toyo Open Country All Terrain rests on little evidence so far (0 tests, 16 reviews), so read this result as provisional.
Pick tire A
Your priority is wet-weather safety
Cooper Discoverer AT3 4S scores 86 vs 68 on wet.
Pick tire A
You enjoy sharp, responsive handling
Cooper Discoverer AT3 4S scores 81 vs 63 on handling.
Pick tire A
You want the most grip on dry roads
Cooper Discoverer AT3 4S scores 82 vs 65 on dry.
Pick tire A
You want the most comfortable ride
Cooper Discoverer AT3 4S scores 80 vs 65 on comfort.
Tire A · Cooper Discoverer AT3 4S
Tire B · Toyo Open Country All Terrain
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Discoverer AT3 4S or Open Country All Terrain?
Which is better in the wet, Discoverer AT3 4S or Open Country All Terrain?
Cooper Discoverer AT3 4S, 86 vs 68 on our wet score.
Which grips better on dry roads, Discoverer AT3 4S or Open Country All Terrain?
Cooper Discoverer AT3 4S, 82 vs 65 on our dry score.
Which is better in snow, Discoverer AT3 4S or Open Country All Terrain?
Cooper Discoverer AT3 4S, 73 vs 64 on our snow score.
Which is more comfortable, Discoverer AT3 4S or Open Country All Terrain?
Cooper Discoverer AT3 4S, 80 vs 65 on our comfort score.
Which lasts longer, Discoverer AT3 4S or Open Country All Terrain?
Cooper Discoverer AT3 4S, 75 vs 67 on our treadwear score.
How do we compare tires?
Every category score blends two independent signals. 60% comes from professional tire tests (braking distances, lap times, noise measurements), each result compared with every other tire in the same test and newer tests counting more. 40% comes from owner reviews found online, adjusted for how generously each site rates. Both use one scale: the average tested tire gets 70, the best 100. When a tire has only one of the two, the missing half is estimated from the other and the score stays closer to average; with no road test and fewer than five owner reviews it gets no score yet.
Handling is the exception: road tests measure it inside the dry and wet scores, so its own row comes from owner ratings only and starts as less important.
Community buzz from Reddit and forums is shown for context only — it never changes the score. Full methodology