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 Nitto NT555 G2 — 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 + 2 road tests and 800 + 412 owner reviews. How we score
Discoverer AT3 XLT is ahead, 78–58
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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 +2455Why this score
Source Discoverer AT3 XLT NT555 G2 Professional tests (TWG score) · – / 1 tests ≈ 75 (est.) 49 Reviews found online 85 64 Discoverer AT3 XLT: 60% × 75.1 (est.) + 40% × 85.3 = 79
NT555 G2: 60% × 49.1 + 40% × 63.7 = 55
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).
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83
Wet
Discoverer AT3 XLT +3251Why this score
Source Discoverer AT3 XLT NT555 G2 Professional tests (TWG score) · – / 1 tests ≈ 80 (est.) 48 Reviews found online 87 54 Discoverer AT3 XLT: 60% × 79.7 (est.) + 40% × 87.2 = 83
NT555 G2: 60% × 48.4 + 40% × 54 = 51
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).
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71
Snow
Discoverer AT3 XLT +2348Why this score
Source Discoverer AT3 XLT NT555 G2 Professional tests (TWG score) ≈ 71 (est.) ≈ 58 (est.) Reviews found online 72 33 Discoverer AT3 XLT: 60% × 70.9 (est.) + 40% × 71.7 = 71
NT555 G2: 60% × 58.4 (est.) + 40% × 32.8 = 48
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 NT555 G2. 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 +1166Why this score
Source Discoverer AT3 XLT NT555 G2 Professional tests (TWG score) ≈ 71 (est.) ≈ 68 (est.) Reviews found online 80 65 Discoverer AT3 XLT: 40% × 71.2 (est.) + 60% × 80.4 = 77
NT555 G2: 40% × 68.3 (est.) + 60% × 65.3 = 66
No road tests of comfort for Discoverer AT3 XLT or NT555 G2. The test half is the tested tires’ average (69): owners’ comfort ratings barely follow the road tests.
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73
Noise
Discoverer AT3 XLT +766Why this score
Source Discoverer AT3 XLT NT555 G2 Professional tests (TWG score) ≈ 67 (est.) ≈ 67 (est.) Reviews found online 82 64 Discoverer AT3 XLT: 60% × 66.5 (est.) + 40% × 82.3 = 73
NT555 G2: 60% × 66.5 (est.) + 40% × 64.3 = 66
No road tests of noise for Discoverer AT3 XLT or NT555 G2. The test half is the tested tires’ average (67): owners’ noise ratings barely follow the road tests.
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74
Treadwear
NT555 G2 +276Why this score
Source Discoverer AT3 XLT NT555 G2 Professional tests (TWG score) · – / 1 tests ≈ 71 (est.) 83 Reviews found online 79 66 Discoverer AT3 XLT: 60% × 71 (est.) + 40% × 79.4 = 74
NT555 G2: 60% × 83.4 + 40% × 66.1 = 76
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 0.35).
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78
Handling (owners)
Discoverer AT3 XLT +1662Why this score
Source Discoverer AT3 XLT NT555 G2 Reviews found online 78 62
Scores at a glance
| Category | Cooper Discoverer AT3 XLT | Nitto NT555 G2 |
|---|---|---|
| Relative Score | 78 | 58 |
| Dry | 79 | 55 |
| Wet | 83 | 51 |
| Snow | 71 | 48 |
| Comfort | 77 | 66 |
| Noise | 73 | 66 |
| Treadwear | 74 | 76 |
| Handling (owners) | 78 | 62 |
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
Neutral
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost
Recomputed
Headline score
78
/ 100
Discoverer AT3 XLT
58
/ 100
NT555 G2
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 NT555 G2
Pros
- Aggressive, visually appealing tread pattern and sidewall design
- Exceptional value and lower price point compared to premium brands like Michelin or Pirelli
- Long-lasting tread life and slow wear rates for a summer performance tire
Cons
- Poor wet-weather traction, with multiple users reporting hydroplaning and a slippery feel in the rain
- Lack of straight-line traction and wheel spin under heavy acceleration, especially on high-horsepower RWD vehicles
- Subpar performance in cooler temperatures or cold conditions, requiring heat to grip properly
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/NissanTitan
·29 upvotes ·2023-03-29
“Put some new tires on the XD today. Cooper Discoverer AT3 XLT in 275/70R18. I usually run BFG KO2s on my trucks but wanted to try something different this time.”
r/f150
·51 upvotes ·2021-12-30
“New shoes this week, Cooper Discoverer At3 XLT. I’m really impressed so far.”
f150forum.com
“Quote: Originally Posted by Stadt This was while I was running a ReadyLift 2.25" level only. The ride was good with only the level, just normal body roll and bed hop. Upgrading to the Bilstein 6112 and 5160 made the truck handle much better. You can gain this same set up with Bilsteins as well. The 285/65R20 did not rub unless the suspension was flexed, but under normal driving conditions, no issues. This tire size is perfect for a 2" level while running the stock wheels. Aftermarket wheels will require a smaller size, 275/65R20 is typically largest before significant rubbing. Thanks for the reply. I actually read through your entire build thread last night. Wow. Awesome stuff there. Im planning on keeping the OEM Platinum trim 20 wheels. So I could run the Discoverer AT3 XLT 275/65 R20 without any rub at all with either a 2 spacer level or something like this kit from Fox? I dont want to trim anything and dont want any rub even when suspension is flexed. It seems like most info online indicates a 33 tire is the max for a 2 level and no rubbing. I believe the 275/65 R20 is a 34 tire. Thanks for the advice!”
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
Nitto NT555 G2
We haven't collected enough community discussion about this tire yet.
Specs side by side
| Attribute | A · Cooper Discoverer AT3 XLT | B · Nitto NT555 G2 |
|---|---|---|
| Category | All-Terrain tire | Summer |
| Vehicle type | SUV and 4x4 | Passenger Car / Crossover |
| Sizes available | 4 | 88 |
| Rim diameters | 16″ – 20″ | 15″ – 22″ |
| Tread depth | 16 - 18/32″ | 10.2/32″ |
| UTQG | — | 320 A A |
| Treadwear warranty | 60,000 mi | — |
| Sidewall | Black Side Wall - Raised White Lettering | Blackwall |
| Max pressure | 35 - 80 psi | 50 psi |
| Sizes in common | 0 | 0 |
Which one should you actually buy?
78
/ 100
Cooper Discoverer AT3 XLT
58
/ 100
Nitto NT555 G2
Winner: Cooper Discoverer AT3 XLT — better wet, dry and snow. Where the Nitto NT555 G2 is ahead, it is by less than 3 points.
Pick tire A
Your priority is wet-weather safety
Cooper Discoverer AT3 XLT scores 83 vs 51 on wet.
Pick tire A
You want the most grip on dry roads
Cooper Discoverer AT3 XLT scores 79 vs 55 on dry.
Pick tire A
You drive through snowy winters
Cooper Discoverer AT3 XLT scores 71 vs 48 on snow.
Pick tire A
You enjoy sharp, responsive handling
Cooper Discoverer AT3 XLT scores 78 vs 62 on handling.
Tire A · Cooper Discoverer AT3 XLT
Tire B · Nitto NT555 G2
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Discoverer AT3 XLT or NT555 G2?
Which is better in the wet, Discoverer AT3 XLT or NT555 G2?
Cooper Discoverer AT3 XLT, 83 vs 51 on our wet score.
Which grips better on dry roads, Discoverer AT3 XLT or NT555 G2?
Cooper Discoverer AT3 XLT, 79 vs 55 on our dry score.
Which is better in snow, Discoverer AT3 XLT or NT555 G2?
Cooper Discoverer AT3 XLT, 71 vs 48 on our snow score.
Which is quieter, Discoverer AT3 XLT or NT555 G2?
Cooper Discoverer AT3 XLT, 73 vs 66 on our noise score.
Which is more comfortable, Discoverer AT3 XLT or NT555 G2?
Cooper Discoverer AT3 XLT, 77 vs 66 on our comfort score.
Which lasts longer, Discoverer AT3 XLT or NT555 G2?
Neither, by our numbers: 74 vs 76 on the treadwear score, within 3 points.
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