Tests – · 1 test Owners 81 · 688 reviews
Best test result: #5 of 18 in 2022 Consumer Reports All Terrain Truck Tires (tested tread life (miles))
“Got some 225/75/16 Cooper Discoverer AT3 4s - Great fit on stock setup.”
Head-to-head
Updated
Cooper Discoverer AT3 4S vs General Grabber X3 — Compared
Relative Score (0–100): the weighted average of the categories below, each 60% road tests and 40% owner reviews. Based on 1 + 0 road tests and 688 + 119 owner reviews. How we score
Discoverer AT3 4S is ahead, 77–68
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Tests – · none yet Owners 67 · 119 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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78
Dry
Discoverer AT3 4S +870Why this score
Source Discoverer AT3 4S Grabber X3 Professional tests (TWG score) ≈ 74 (est.) ≈ 69 (est.) Reviews found online 84 71 Discoverer AT3 4S: 60% × 74.3 (est.) + 40% × 84 = 78
Grabber X3: 60% × 69.2 (est.) + 40% × 71.3 = 70
No road tests of dry for Discoverer AT3 4S. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.40).
No road tests of dry for Grabber X3. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.40).
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81
Wet
Discoverer AT3 4S +1071Why this score
Source Discoverer AT3 4S Grabber X3 Professional tests (TWG score) ≈ 78 (est.) ≈ 70 (est.) Reviews found online 85 71 Discoverer AT3 4S: 60% × 78.5 (est.) + 40% × 85.3 = 81
Grabber X3: 60% × 70.4 (est.) + 40% × 70.8 = 71
No road tests of wet for Discoverer AT3 4S. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.56).
No road tests of wet for Grabber X3. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.56).
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72
Snow
Discoverer AT3 4S +270Why this score
Source Discoverer AT3 4S Grabber X3 Professional tests (TWG score) ≈ 71 (est.) ≈ 70 (est.) Reviews found online 73 70 Discoverer AT3 4S: 60% × 71 (est.) + 40% × 73.3 = 72
Grabber X3: 60% × 69.9 (est.) + 40% × 69.8 = 70
No road tests of snow for Discoverer AT3 4S. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.33).
No road tests of snow for Grabber X3. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.33).
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76
Comfort
Discoverer AT3 4S +1264Why this score
Source Discoverer AT3 4S Grabber X3 Professional tests (TWG score) ≈ 71 (est.) ≈ 67 (est.) Reviews found online 82 58 Discoverer AT3 4S: 60% × 71.4 (est.) + 40% × 82.3 = 76
Grabber X3: 60% × 67.2 (est.) + 40% × 58 = 64
No road tests of comfort for Discoverer AT3 4S or Grabber X3. 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 4S +1261Why this score
Source Discoverer AT3 4S Grabber X3 Professional tests (TWG score) ≈ 67 (est.) ≈ 67 (est.) Reviews found online 81 52 Discoverer AT3 4S: 60% × 67.3 (est.) + 40% × 80.9 = 73
Grabber X3: 60% × 67.3 (est.) + 40% × 51.7 = 61
No road tests of noise for Discoverer AT3 4S or Grabber X3. The test half is the tested tires’ average (67): owners’ noise ratings barely follow the road tests.
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73
Treadwear
Discoverer AT3 4S +865Why this score
Source Discoverer AT3 4S Grabber X3 Professional tests (TWG score) · 1 / – tests 71 ≈ 66 (est.) Reviews found online 77 65 Discoverer AT3 4S: 60% × 70.9 + 40% × 77 = 73
Grabber X3: 60% × 65.6 (est.) + 40% × 65.4 = 65
No road tests of treadwear for Grabber X3. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.31).
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77
Handling (owners)
Discoverer AT3 4S +1958Why this score
Source Discoverer AT3 4S Grabber X3 Reviews found online 77 58
Scores at a glance
| Category | Cooper Discoverer AT3 4S | General Grabber X3 |
|---|---|---|
| Relative Score | 77 | 68 |
| Dry | 78 | 70 |
| Wet | 81 | 71 |
| Snow | 72 | 70 |
| Comfort | 76 | 64 |
| Noise | 73 | 61 |
| Treadwear | 73 | 65 |
| Handling (owners) | 77 | 58 |
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
77
/ 100
Discoverer AT3 4S
68
/ 100
Grabber X3
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 Grabber X3
Pros
- Exceptional off-road traction in mud, sand, rocks, and snow
- Surprisingly quiet on the highway for a mud-terrain tire
- Aggressive and appealing visual design, including popular red lettering
Cons
- Initial high-speed handling instability or 'squirminess' reported by some drivers
- Prone to throwing rocks and debris, potentially chipping paint
- Occasional reports of rapid or uneven tread wear and cupping
What real owners are saying
From Reddit, forums and review threads. Not part of our score
Tire A
Positive
Cooper Discoverer AT3 4S
Community sentiment for the Cooper Discoverer AT3 4S is predominantly positive, with drivers praising its quiet highway ride, strong traction across snow, rain, and dry pavement, and appealing appearance. Several owners note that while it handles light off-road duties and daily driving well, tread life occasionally falls short of mileage expectations. In addition, multiple posts highlight frustration and concern regarding availability and recent discontinuation across various sizes.
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”
ramforum.com
·2023-01-27
“Installed new Cooper Discoverer AT3 4s tires on my 1500 today. Took off a set that I put on three years ago when the stock tires wore out. I think I got good performance from the first set, but they didn't last as long as I would have hoped. They were getting pretty close to the wear bars, so had some life left. The guy at the tire shop estimated that I would get another 10000 miles out of them. They had a little less than 40 K miles. We got a bit of snow here this week, and I could tell that they were not gripping nearly as well as they did before. If it was spring/summer, they would have stayed on the truck. I will be driving to Maine next week, pulling a snowmobile trailer, so I decided that it was time to buy now, rather than risking a wreck. New tires look similar to the old ones. Still made in USA (good), no longer available with white letters, black wall only, in cast that is important to you.”
f150forum.com
“I went with the Cooper Discoverer AT3 4s (275/65/18). The Michelin Primacy XC were on there when I purchased and they were terrible. I like the looks of the Coopers...the ride is much more controlled and a bit softer over broken surfaces. They do have some slip off the line of you give it full throttle real similar to the XCs. I was looking for an AT that would be great at hooking up in dry weather but probably not gong to find an AT that is sticky enough. They're brand-new so I'll give an update after a few hundred miles or so (I don't put a lot of miles so it'll take time). Thanks to the Forum for the info!”
Top themes
#Snow and wet traction#Quiet highway ride#Tread life and longevity#Discontinuation and availability#Comfortable ride quality#Mild off-road performance
Based on 27 community posts
Tire B
General Grabber X3
We haven't collected enough community discussion about this tire yet.
Specs side by side
| Attribute | A · Cooper Discoverer AT3 4S | B · General Grabber X3 |
|---|---|---|
| Category | All-Terrain tire | Mud-Terrain tire |
| Vehicle type | SUV and 4x4 | SUV and 4x4 |
| Sizes available | 14 | 6 |
| Rim diameters | 15″ – 22″ | 16″ – 18″ |
| Tread depth | 12 - 14/32″ | 18 - 21/32″ |
| UTQG | 620 A B | AA A |
| Treadwear warranty | 65,000 mi | — |
| Sidewall | Black Side Wall - Raised Outline White Lettering | Black Side Wall - Serrated Raised Lettering |
| Max pressure | 44 - 50 psi | 35 - 80 psi |
| Sizes in common | 1 | 1 |
Which one should you actually buy?
77
/ 100
Cooper Discoverer AT3 4S
68
/ 100
General Grabber X3
Winner: Cooper Discoverer AT3 4S — better handling, comfort and noise. It leads or ties in every category we score.
Pick tire A
You enjoy sharp, responsive handling
Cooper Discoverer AT3 4S scores 77 vs 58 on handling.
Pick tire A
You want the most comfortable ride
Cooper Discoverer AT3 4S scores 76 vs 64 on comfort.
Pick tire A
You want a quieter cabin
Cooper Discoverer AT3 4S scores 73 vs 61 on noise.
Pick tire A
Your priority is wet-weather safety
Cooper Discoverer AT3 4S scores 81 vs 71 on wet.
Tire A · Cooper Discoverer AT3 4S
Tire B · General Grabber X3
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Discoverer AT3 4S or Grabber X3?
Which is better in the wet, Discoverer AT3 4S or Grabber X3?
Cooper Discoverer AT3 4S, 81 vs 71 on our wet score.
Which grips better on dry roads, Discoverer AT3 4S or Grabber X3?
Cooper Discoverer AT3 4S, 78 vs 70 on our dry score.
Which is better in snow, Discoverer AT3 4S or Grabber X3?
Neither, by our numbers: 72 vs 70 on the snow score, within 3 points.
Which is quieter, Discoverer AT3 4S or Grabber X3?
Cooper Discoverer AT3 4S, 73 vs 61 on our noise score.
Which is more comfortable, Discoverer AT3 4S or Grabber X3?
Cooper Discoverer AT3 4S, 76 vs 64 on our comfort score.
Which lasts longer, Discoverer AT3 4S or Grabber X3?
Cooper Discoverer AT3 4S, 73 vs 65 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