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 Sumitomo Encounter AT — 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
Sumitomo
Sumitomo Encounter AT
85
/ 100
Objective (60%)
–/100
No test data yet
User signal (40%)
82/100
Owner ratings
Prices change daily — check the retailer for your size.
VerdictWinner: Cooper Discoverer AT3 LT — better treadwear, dry and handling. 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 9
Why this score
| Source | Discoverer AT3 LT | Encounter AT |
|---|---|---|
| Tyre Reviews owners | 85 | – |
| SimpleTire owners | 100 | 98 |
| America's Tire owners | 97 | – |
Wet
Score (0–100)
Discoverer AT3 LT leads by 7
Why this score
| Source | Discoverer AT3 LT | Encounter AT |
|---|---|---|
| Tyre Reviews owners | 85 | – |
| SimpleTire owners | 95 | 95 |
| America's Tire owners | 94 | – |
Snow
Score (0–100)
Discoverer AT3 LT leads by 6
Why this score
| Source | Discoverer AT3 LT | Encounter AT |
|---|---|---|
| Tyre Reviews owners | 90 | – |
| SimpleTire owners | 93 | 90 |
Comfort
Score (0–100)
Discoverer AT3 LT leads by 8
Why this score
| Source | Discoverer AT3 LT | Encounter AT |
|---|---|---|
| Tyre Reviews owners | 75 | – |
| SimpleTire owners | 95 | 92 |
| America's Tire owners | 94 | – |
Noise
Score (0–100)
Discoverer AT3 LT leads by 6
Why this score
| Source | Discoverer AT3 LT | Encounter AT |
|---|---|---|
| SimpleTire owners | 93 | 89 |
| America's Tire owners | 92 | – |
Treadwear
Score (0–100)
Discoverer AT3 LT leads by 14
Why this score
| Source | Discoverer AT3 LT | Encounter AT |
|---|---|---|
| Tyre Reviews owners | 40 | – |
| SimpleTire owners | 100 | 89 |
| America's Tire owners | 93 | – |
Handling
Score (0–100)
Discoverer AT3 LT leads by 9
Why this score
| Source | Discoverer AT3 LT | Encounter AT |
|---|---|---|
| Tyre Reviews owners | 45 | – |
| America's Tire owners | 94 | – |
Scores at a glance
| Category | Cooper Discoverer AT3 LT | Sumitomo Encounter AT |
|---|---|---|
| Relative Score | 94 | 85 |
| Dry | 97 | 88 |
| Wet | 95 | 88 |
| Snow | 91 | 85 |
| Comfort | 94 | 86 |
| Noise | 92 | 86 |
| Treadwear | 93 | 79 |
| Handling | 94 | 85 |
Higher is better. The Relative Score follows your weights below; category scores do not change.
Personalize
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.
Neutral
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Neutral
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Neutral
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Neutral
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Important
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Neutral
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Recomputed
Headline score
94
/ 100
Tire A
85
/ 100
Tire B
Specifications
Specs side by side
| Attribute | A · Cooper Discoverer AT3 LT | B · Sumitomo Encounter AT |
|---|---|---|
| Category | Premium Touring All Season tire | — |
| Vehicle type | SUV and 4x4 | — |
| Sizes available | 9 | 15 |
| Rim diameters | 16″ – 18″ | 16″ – 20″ |
| Tread depth | 16 - 17/32″ | 13/32″ |
| UTQG | — | 660 A B |
| Treadwear warranty | 60,000 mi | 60,000 mi |
| Sidewall | Black Side Wall - Raised Outline White Lettering | Blackwall |
| Max pressure | 50 - 80 psi | 51 psi |
Final verdict
Which one should you actually buy?
94
/ 100
Cooper
85
/ 100
Sumitomo
Winner: Cooper Discoverer AT3 LT — better treadwear, dry and handling. It leads or ties in every category we score.
Pick tire A
You want the longest tread life
Cooper Discoverer AT3 LT scores 93 vs 79 on treadwear.
Pick tire A
You want the most grip on dry roads
Cooper Discoverer AT3 LT scores 97 vs 88 on dry.
Pick tire A
You enjoy sharp, responsive handling
Cooper Discoverer AT3 LT scores 94 vs 85 on handling.
Pick tire A
You want the most comfortable ride
Cooper Discoverer AT3 LT scores 94 vs 86 on comfort.
Tire A · Cooper Discoverer AT3 LT
Tire B · Sumitomo Encounter AT
More comparisons
Also compared with
Cooper Discoverer AT3 LT also compared with
Sumitomo Encounter AT 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.