94
/ 100
Objective (60%)
–/100
No test data yet
User signal (40%)
94/100
191 owner reviews
Prices change daily — check the retailer for your size.
Head-to-head
Updated May 2026
Cooper Discoverer AT3 LT vs Toyo Open Country A/T II — Compared (May 2026)
Our Relative Score blends 60% objective test data with 40% owner-review signal — so any two tires can be compared even if they were never tested on the same day.
VS
Tire B
Toyo
Toyo Open Country A/T II
92
/ 100
Objective (60%)
–/100
No test data yet
User signal (40%)
92/100
816 owner reviews
Prices change daily — check the retailer for your size.
VerdictWinner: Cooper Discoverer AT3 LT — better wet and noise. It leads or ties in every category we score.
Read full
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Category breakdown
7 categories, side by side
Each bar is the Relative Score for that category. Expand a tile to see the test results and owner ratings behind it.
Dry
Score (0–100)
Discoverer AT3 LT leads by 1
Why this score
| Source | Discoverer AT3 LT | Open Country A/T II |
|---|---|---|
| Tyre Reviews owners | 85 | 65 |
| SimpleTire owners | 100 | – |
| America's Tire owners | 97 | – |
Wet
Score (0–100)
Discoverer AT3 LT leads by 4
Why this score
| Source | Discoverer AT3 LT | Open Country A/T II |
|---|---|---|
| Tyre Reviews owners | 85 | 50 |
| SimpleTire owners | 95 | – |
| America's Tire owners | 94 | – |
Snow
Score (0–100)
Why this score
| Source | Discoverer AT3 LT | Open Country A/T II |
|---|---|---|
| Tyre Reviews owners | 90 | 45 |
| SimpleTire owners | 93 | – |
Comfort
Score (0–100)
Discoverer AT3 LT leads by 1
Why this score
| Source | Discoverer AT3 LT | Open Country A/T II |
|---|---|---|
| Tyre Reviews owners | 75 | 80 |
| SimpleTire owners | 95 | – |
| America's Tire owners | 94 | – |
Noise
Score (0–100)
Discoverer AT3 LT leads by 3
Why this score
| Source | Discoverer AT3 LT | Open Country A/T II |
|---|---|---|
| SimpleTire owners | 93 | – |
| America's Tire owners | 92 | – |
Treadwear
Score (0–100)
Discoverer AT3 LT leads by 1
Why this score
| Source | Discoverer AT3 LT | Open Country A/T II |
|---|---|---|
| Tyre Reviews owners | 40 | 75 |
| SimpleTire owners | 100 | – |
| America's Tire owners | 93 | – |
Handling
Score (0–100)
Discoverer AT3 LT leads by 1
Why this score
| Source | Discoverer AT3 LT | Open Country A/T II |
|---|---|---|
| Tyre Reviews owners | 45 | 60 |
| America's Tire owners | 94 | – |
Scores at a glance
| Category | Cooper Discoverer AT3 LT | Toyo Open Country A/T II |
|---|---|---|
| Relative Score | 94 | 92 |
| Dry | 97 | 96 |
| Wet | 95 | 91 |
| Snow | 91 | 91 |
| Comfort | 94 | 93 |
| Noise | 92 | 89 |
| Treadwear | 93 | 92 |
| Handling | 94 | 93 |
Higher is better. The Relative Score follows your weights below; category scores do not change.
Personalize
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Wet grip and treadwear start at “Important” — the two things buyers rank highest. Move the sliders and the scores update instantly.
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Neutral
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Recomputed
Headline score
94
/ 100
Tire A
92
/ 100
Tire B
From owners
Pros, cons & observations
Themes extracted from owner reviews across retailers and review sites — not the opinion of TireWheelGuide.
Not enough owner reviews yet to extract themes.
The Toyo Open Country A/T II is widely regarded as a versatile, durable, and quiet all-terrain tire that excels in mixed-use scenarios, including towing and light-to-moderate off-roading. While the vast majority of users praise its longevity and highway comfort, a subset of owners reports persistent issues with high-speed balancing and inconsistent performance on slick, wet pavement.
Pros
- Excellent highway comfort and low road noise for an all-terrain tire
- Strong off-road capability in mud, sand, and loose rock
- High durability and tread life when properly maintained
- Predictable handling and stability while towing heavy loads
Cons
- Persistent reports of vibration and difficulty achieving a proper high-speed balance
- Inconsistent traction on wet or freshly rained-on pavement
- Potential for uneven tread wear if rotation and pressure are not strictly managed
- Some users find the compound too stiff for optimal grip in icy or packed snow conditions
Observations
- Heavy-duty truck owners (e.g., Ram 2500/3500) report excellent towing stability, provided tire pressures are adjusted using the 'chalk test' to prevent center-tread wear.
- Users opting for 'C' load ratings on lighter vehicles like the Jeep Wrangler report a more comfortable ride but note 'squishy' sidewalls during off-road deflation compared to 'E' load versions.
- Owners of smaller SUVs and crossovers (e.g., Subaru Crosstrek) generally find the tire to be a significant aesthetic and functional upgrade over stock tires with minimal noise penalty.
Specifications
Specs side by side
| Attribute | A · Cooper Discoverer AT3 LT | B · Toyo Open Country A/T II |
|---|---|---|
| Category | Premium Touring All Season tire | — |
| Vehicle type | SUV and 4x4 | — |
| Sizes available | 9 | — |
| Rim diameters | 16″ – 18″ | — |
| Tread depth | 16 - 17/32″ | — |
| Treadwear warranty | 60,000 mi | — |
| Sidewall | Black Side Wall - Raised Outline White Lettering | — |
| Max pressure | 50 - 80 psi | — |
Final verdict
Which one should you actually buy?
94
/ 100
Cooper
92
/ 100
Toyo
Winner: Cooper Discoverer AT3 LT — better wet and noise. It leads or ties in every category we score.
Pick tire A
Your priority is wet-weather safety
Cooper Discoverer AT3 LT scores 95 vs 91 on wet.
Pick tire A
You want a quieter cabin
Cooper Discoverer AT3 LT scores 92 vs 89 on noise.
Tire A · Cooper Discoverer AT3 LT
Tire B · Toyo Open Country A/T II
More comparisons
Also compared with
Cooper Discoverer AT3 LT also compared with
Toyo Open Country A/T II also compared with
How do we compare tires?
Every category score blends two independent signals. 60% comes from professional tire tests (braking distances, lap times, noise measurements) normalized against the best tire in each test and weighted toward recent tests. 40% comes from thousands of owner reviews collected from retailers and review sites. When a tire has only one of the two, we use what exists and say so.
Community buzz from Reddit and forums is shown for context only — it never changes the score.