Tests – · none yet Owners 82 · 800 reviews
“New shoes this week, Cooper Discoverer At3 XLT. I’m really impressed so far.”
Head-to-head
Updated
Cooper Discoverer AT3 XLT 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 0 + 0 road tests and 800 + 16 owner reviews. How we score
Discoverer AT3 XLT is ahead, 78–66
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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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79
Dry
Discoverer AT3 XLT +1564Why this score
Source Discoverer AT3 XLT Open Country All Terrain Professional tests (TWG score) ≈ 75 (est.) ≈ 66 (est.) Reviews found online 85 63 Discoverer AT3 XLT: 60% × 75.1 (est.) + 40% × 85.3 = 79
Open Country All Terrain: 60% × 65.7 (est.) + 40% × 62.6 = 64
No road tests of dry for Discoverer AT3 XLT. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.41).
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 0.41).
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83
Wet
Discoverer AT3 XLT +1568Why this score
Source Discoverer AT3 XLT Open Country All Terrain Professional tests (TWG score) ≈ 80 (est.) ≈ 69 (est.) Reviews found online 87 67 Discoverer AT3 XLT: 60% × 79.7 (est.) + 40% × 87.2 = 83
Open Country All Terrain: 60% × 68.6 (est.) + 40% × 66.9 = 68
No road tests of wet for Discoverer AT3 XLT. 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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71
Snow
Discoverer AT3 XLT +764Why this score
Source Discoverer AT3 XLT Open Country All Terrain Professional tests (TWG score) ≈ 71 (est.) ≈ 67 (est.) Reviews found online 72 59 Discoverer AT3 XLT: 60% × 70.9 (est.) + 40% × 71.7 = 71
Open Country All Terrain: 60% × 66.9 (est.) + 40% × 59 = 64
No road tests of snow for Discoverer AT3 XLT. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.32).
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 0.32).
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77
Comfort
Discoverer AT3 XLT +1265Why this score
Source Discoverer AT3 XLT Open Country All Terrain Professional tests (TWG score) ≈ 71 (est.) ≈ 68 (est.) Reviews found online 80 63 Discoverer AT3 XLT: 40% × 71 (est.) + 60% × 80.3 = 77
Open Country All Terrain: 40% × 67.5 (est.) + 60% × 63.1 = 65
No road tests of comfort for Discoverer AT3 XLT. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.20).
No road tests of comfort for Open Country All Terrain. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.20).
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73
Noise
No comparison–Why this score
Source Discoverer AT3 XLT Open Country All Terrain Professional tests (TWG score) ≈ 66 (est.) – Reviews found online 82 – Discoverer AT3 XLT: 60% × 66.4 (est.) + 40% × 82.4 = 73
No road tests of noise for Discoverer AT3 XLT. The test half is the tested tires’ average (66): owners’ noise ratings barely follow the road tests.
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74
Treadwear
Discoverer AT3 XLT +767Why this score
Source Discoverer AT3 XLT Open Country All Terrain Professional tests (TWG score) ≈ 71 (est.) ≈ 67 (est.) Reviews found online 79 67 Discoverer AT3 XLT: 60% × 71.2 (est.) + 40% × 79.4 = 74
Open Country All Terrain: 60% × 66.7 (est.) + 40% × 66.9 = 67
No road tests of treadwear for Discoverer AT3 XLT. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.36).
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 0.36).
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78
Handling (owners)
Discoverer AT3 XLT +1563Why this score
Source Discoverer AT3 XLT Open Country All Terrain Reviews found online 78 63
Scores at a glance
| Category | Cooper Discoverer AT3 XLT | Toyo Open Country All Terrain |
|---|---|---|
| Relative Score | 78 | 66 |
| Dry | 79 | 64 |
| Wet | 83 | 68 |
| Snow | 71 | 64 |
| Comfort | 77 | 65 |
| Noise | 73 | – |
| Treadwear | 74 | 67 |
| Handling (owners) | 78 | 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
78
/ 100
Discoverer AT3 XLT
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 XLT
Pros
- Significantly lower road noise than comparable aggressive all-terrain tires
- Excellent wet weather, snow, and slush traction
- Sturdy sidewalls and stable performance when towing heavy loads
Cons
- Some users report difficulty with balancing, leading to vibrations or a rough ride
- Tread life occasionally falls short of expectations for certain drivers
- Can struggle or get gummed up in deep mud
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 XLT
Community members report high satisfaction with the Cooper Discoverer AT3 XLT, highlighting its quiet ride, long tread life, and strong winter performance. Several owners praise its smooth ride quality and durability under towing conditions compared to rival all-terrain tires. Discussion also commonly centers around sizing, fitment, and snow ratings.
r/Offroad
·1 upvote ·2025-10-02
“I’ve run Hankook dynapro’s, BFG ko2, Nokian outpost nat, and fallen wild peaks. Currently running Cooper discoverer AT3 XLT - they are definitely the quietest all terrains I’ve had. I would recommend them if they are available in your size - many places like simpletire or priority tire carry them.”
r/ram_trucks
·22 upvotes ·2021-11-19
“New Cooper Discoverer AT3 XLT 275/75R20 these ride way better than my old Open Country A/T II”
r/f150
·51 upvotes ·2021-12-30
“New shoes this week, Cooper Discoverer At3 XLT. I’m really impressed so far.”
Top themes
#low road noise#tread longevity and wear#snow and winter traction#tire sizing and fitment#ride quality and comfort#towing performance
Based on 13 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 XLT | B · Toyo Open Country All Terrain |
|---|---|---|
| Category | All-Terrain tire | All-Terrain tire |
| Vehicle type | SUV and 4x4 | SUV and 4x4 |
| Sizes available | 4 | — |
| Rim diameters | 16″ – 20″ | — |
| Tread depth | 16 - 18/32″ | — |
| Treadwear warranty | 60,000 mi | — |
| Sidewall | Black Side Wall - Raised White Lettering | — |
| Max pressure | 35 - 80 psi | — |
Which one should you actually buy?
78
/ 100
Cooper Discoverer AT3 XLT
66
/ 100
Toyo Open Country All Terrain
Winner: Cooper Discoverer AT3 XLT — better dry, wet and handling. 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
You want the most grip on dry roads
Cooper Discoverer AT3 XLT scores 79 vs 64 on dry.
Pick tire A
Your priority is wet-weather safety
Cooper Discoverer AT3 XLT scores 83 vs 68 on wet.
Pick tire A
You enjoy sharp, responsive handling
Cooper Discoverer AT3 XLT scores 78 vs 63 on handling.
Pick tire A
You want the most comfortable ride
Cooper Discoverer AT3 XLT scores 77 vs 65 on comfort.
Tire A · Cooper Discoverer AT3 XLT
Tire B · Toyo Open Country All Terrain
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Discoverer AT3 XLT or Open Country All Terrain?
Which is better in the wet, Discoverer AT3 XLT or Open Country All Terrain?
Cooper Discoverer AT3 XLT, 83 vs 68 on our wet score.
Which grips better on dry roads, Discoverer AT3 XLT or Open Country All Terrain?
Cooper Discoverer AT3 XLT, 79 vs 64 on our dry score.
Which is better in snow, Discoverer AT3 XLT or Open Country All Terrain?
Cooper Discoverer AT3 XLT, 71 vs 64 on our snow score.
Which is more comfortable, Discoverer AT3 XLT or Open Country All Terrain?
Cooper Discoverer AT3 XLT, 77 vs 65 on our comfort score.
Which lasts longer, Discoverer AT3 XLT or Open Country All Terrain?
Cooper Discoverer AT3 XLT, 74 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