Tests – · 1 test Owners 81 · 688 reviews
“New shoes today! Cooper Discoverer AT3 4S - 275/65/18”
Head-to-head
Updated
Cooper Discoverer AT3 4S vs Toyo Open Country A/T plus — Compared
Relative Score (0–100): 60% professional tests, 40% owner reviews.
Discoverer AT3 4S is ahead, 77–63
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Tests – · none yet Owners 61 · 11 reviews
Category by category
Relative Score per category, 0–100. Open “Why this score” for the tests and owner ratings behind it.
-
78
Dry
Discoverer AT3 4S +1266Why this score
Source Discoverer AT3 4S Open Country A/T plus Reviews found online 84 65 -
82
Wet
Discoverer AT3 4S +1864Why this score
Source Discoverer AT3 4S Open Country A/T plus Reviews found online 86 62 -
72
Snow
No comparison–Why this score
Source Discoverer AT3 4S Open Country A/T plus Reviews found online 73 – -
76
Comfort
Discoverer AT3 4S +1066Why this score
Source Discoverer AT3 4S Open Country A/T plus Reviews found online 83 62 -
72
Noise
No comparison–Why this score
Source Discoverer AT3 4S Open Country A/T plus Reviews found online 81 – -
73
Treadwear
Discoverer AT3 4S +1459Why this score
Source Discoverer AT3 4S Open Country A/T plus Professional tests (TWG score) 71 – Reviews found online 77 54 -
77
Handling
Discoverer AT3 4S +1364Why this score
Source Discoverer AT3 4S Open Country A/T plus Reviews found online 77 64
Scores at a glance
| Category | Cooper Discoverer AT3 4S | Toyo Open Country A/T plus |
|---|---|---|
| Relative Score | 77 | 63 |
| Dry | 78 | 66 |
| Wet | 82 | 64 |
| Snow | 72 | – |
| Comfort | 76 | 66 |
| Noise | 72 | – |
| Treadwear | 73 | 59 |
| Handling | 77 | 64 |
Higher is better. The Relative Score follows your weights below; category scores do not change.
Weight the categories that matter to you
Wet grip and treadwear start at “Important” — the two things buyers rank highest. Move the sliders and the scores update instantly.
Important
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Important
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Neutral
NoneLessNeutralMoreMost
Neither tire has a score here yet, so this weight changes nothing.
Less important
NoneLessNeutralMoreMost
Less important
NoneLessNeutralMoreMost
Neither tire has a score here yet, so this weight changes nothing.
Important
NoneLessNeutralMoreMost
Neutral
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Recomputed
Headline score
77
/ 100
Discoverer AT3 4S
63
/ 100
Open Country A/T plus
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 A/T plus
Pros
- Exceptionally low road noise for an all-terrain tire
- Strong traction in off-road conditions such as mud, grass, gravel, and snow
- Good overall value and pricing relative to premium brands
Cons
- Some reports of faster-than-desired tread wear or soft rubber compound
- Occasional complaints about reduced grip or a spongy feel on wet tarmac
- Not optimized for extreme deep snow or heavy-duty mud terrain applications
What real owners are saying
From Reddit, forums and review threads. Not part of our score
Tire A
Positive
Cooper Discoverer AT3 4S
The Cooper Discoverer AT3 4S is widely praised by the community for its quiet and comfortable highway ride, excellent wet and snow traction, and solid fuel efficiency. Drivers appreciate its balance of rugged aesthetics and daily drivability, though recent discussions highlight growing concerns over reported product discontinuations and sizing shortages.
r/3rdGen4Runner
·7 upvotes ·2021-07-25
“02 SR5 - New Cooper Discoverer AT3 4S P235/75R15 - beautiful tire - excellent handling/feel”
r/4Runner
·2 upvotes ·2023-10-23
“Tire Question: Michelin Defenders or Cooper Discoverer AT3 4S I have a TRD ORP and want to replace the crappy stock Dunlops. Almost all my driving is on road so looking at the Michelin Defenders or the Cooper AT3 4S in the stock size. I prefer the looks of the coopers but am I going to notice any decrease in wet performance, road noise or mpg compared to the Michelins?”
r/tires
·1 upvote ·2026-09-08
“Tire Recs for F150 - mostly highway and some muddy field edges - Cooper or Falken? I mostly put highway miles on my 2011 F150 but Im a bow hunter so October and November I spend a decent amount of time driving on field edges to get to hinting spots. When its wet, these field edges get pretty sloppy. I have Cooper Discoverer AT3 4S currently. While Ive never gotten stuck, there's been a few sweaty moments where it felt close. These have been great on road tires with low road noise, great fuel efficiency, and impressive handling in wet, dry, and snow. I want to maintain on road performance as thats 90% of my use, but curious if there are any thoughts on the new Cooper Discoverer Road + Trail AT, vs Falken Rubitrek, or Falken Wildpeak AT3 or AT4. Im leaning going Coopers again and hoping for the best on those occasional muddy mornings. Let me know thoughts and experiences. Read more”
Top themes
#Highway performance and low noise#Wet and snow traction#Tread wear and longevity#Availability and discontinuation rumors#Light off-road capability#Fuel economy and MPG
Based on 15 community posts
Tire B
Toyo Open Country A/T plus
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 A/T plus |
|---|---|---|
| Category | All Season | Summer |
| Vehicle type | SUV and 4x4 | SUV and 4x4 |
| Sizes available | 14 | 54 |
| Rim diameters | 15″ – 22″ | 15″ – 21″ |
| 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?
77
/ 100
Cooper Discoverer AT3 4S
63
/ 100
Toyo Open Country A/T plus
Winner: Cooper Discoverer AT3 4S — better wet, treadwear and handling. It leads or ties in every category we score.
Pick tire A
Your priority is wet-weather safety
Cooper Discoverer AT3 4S scores 82 vs 64 on wet.
Pick tire A
You want the longest tread life
Cooper Discoverer AT3 4S scores 73 vs 59 on treadwear.
Pick tire A
You enjoy sharp, responsive handling
Cooper Discoverer AT3 4S scores 77 vs 64 on handling.
Pick tire A
You want the most grip on dry roads
Cooper Discoverer AT3 4S scores 78 vs 66 on dry.
Tire A · Cooper Discoverer AT3 4S
Tire B · Toyo Open Country A/T plus
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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.
Community buzz from Reddit and forums is shown for context only — it never changes the score.