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Cooper Discoverer S/T Maxx vs General Grabber X3 — 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 326 + 119 owner reviews. How we score

Discoverer S/T Maxx leads, 67–65 Narrow edge

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Cooper Discoverer S/T Maxx
Tire ACooper

Discoverer S/T Maxx

All Season

± 7

Tests – · none yet Owners 67 · 326 reviews

“Personally a huge fan of the Cooper Discoverer S/T Maxx great on and offroad. Quite on road.”

General Grabber X3
Tire BGeneral

Grabber X3

Mud-Terrain tire

± 7

Tests – · none yet Owners 64 · 119 reviews

Category by category

Relative Score per category, 0–100. Open “Why this score” for the tests and owner ratings behind it.

  1. 71

    Dry

    Discoverer S/T Maxx +3
    68
    Why this score
    SourceDiscoverer S/T MaxxGrabber X3
    Professional tests (TWG score)≈ 70 (est.)≈ 68 (est.)
    Reviews found online7369

    Discoverer S/T Maxx: 60% × 70.2 (est.) + 40% × 73.4 = 71

    Grabber X3: 60% × 68.3 (est.) + 40% × 68.8 = 68

    No road tests of dry for Discoverer S/T Maxx. 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 Grabber X3. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.41).

  2. 72

    Wet

    Discoverer S/T Maxx +3
    69
    Why this score
    SourceDiscoverer S/T MaxxGrabber X3
    Professional tests (TWG score)≈ 72 (est.)≈ 70 (est.)
    Reviews found online7369

    Discoverer S/T Maxx: 60% × 71.9 (est.) + 40% × 72.8 = 72

    Grabber X3: 60% × 69.8 (est.) + 40% × 69 = 69

    No road tests of wet for Discoverer S/T Maxx. 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 Grabber X3. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).

  3. 69

    Snow

    Level
    69
    Why this score
    SourceDiscoverer S/T MaxxGrabber X3
    Professional tests (TWG score)≈ 70 (est.)≈ 70 (est.)
    Reviews found online6768

    Discoverer S/T Maxx: 60% × 69.5 (est.) + 40% × 67.4 = 69

    Grabber X3: 60% × 69.8 (est.) + 40% × 68.4 = 69

    No road tests of snow for Discoverer S/T Maxx. 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 Grabber X3. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.32).

  4. 59

    Comfort

    Discoverer S/T Maxx +2
    57
    Why this score
    SourceDiscoverer S/T MaxxGrabber X3
    Professional tests (TWG score)≈ 66 (est.)≈ 65 (est.)
    Reviews found online5551

    Discoverer S/T Maxx: 40% × 65.8 (est.) + 60% × 54.7 = 59

    Grabber X3: 40% × 65.2 (est.) + 60% × 51.3 = 57

    No road tests of comfort for Discoverer S/T Maxx. 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 Grabber X3. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.20).

  5. 59

    Noise

    Level
    59
    Why this score
    SourceDiscoverer S/T MaxxGrabber X3
    Professional tests (TWG score)≈ 66 (est.)≈ 66 (est.)
    Reviews found online4848

    Discoverer S/T Maxx: 60% × 66.4 (est.) + 40% × 47.5 = 59

    Grabber X3: 60% × 66.4 (est.) + 40% × 47.5 = 59

    No road tests of noise for Discoverer S/T Maxx or Grabber X3. The test half is the tested tires’ average (66): owners’ noise ratings barely follow the road tests.

  6. 66

    Treadwear

    Discoverer S/T Maxx +1
    65
    Why this score
    SourceDiscoverer S/T MaxxGrabber X3
    Professional tests (TWG score)≈ 66 (est.)≈ 65 (est.)
    Reviews found online6663

    Discoverer S/T Maxx: 60% × 66.4 (est.) + 40% × 66.2 = 66

    Grabber X3: 60% × 65.4 (est.) + 40% × 63.4 = 65

    No road tests of treadwear for Discoverer S/T Maxx. 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 Grabber X3. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.36).

  7. 52

    Handling (owners)

    Grabber X3 +1
    53
    Why this score
    SourceDiscoverer S/T MaxxGrabber X3
    Reviews found online5253
Scores at a glance
CategoryCooper Discoverer S/T MaxxGeneral Grabber X3
Relative Score 67 65
Dry 71 68
Wet 72 69
Snow 69 69
Comfort 59 57
Noise 59 59
Treadwear 66 65
Handling (owners) 52 53

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
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Neutral
NotLessNeutralImportantMost
Less important
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Less important
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Neutral
NotLessNeutralImportantMost
Less important
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Recomputed
Headline score
± 7

Discoverer S/T Maxx

± 7

Grabber X3

Pros, cons & observations

Themes extracted from owner reviews found online — not the opinion of TireWheelGuide.

Tire A Discoverer S/T Maxx

Pros

  • Aggressive all-terrain tread pattern that excels in dirt, gravel, sand, and moderate mud
  • Surprisingly quiet and smooth ride on the highway for such a rugged tire
  • Exceptional sidewall strength and puncture resistance against sharp rocks and debris

Cons

  • Faster-than-expected tread wear for some users, particularly on heavier duty or lighter vehicles
  • Subpar wet pavement traction, specifically in cold or greasy conditions
  • Stiff ride quality and potential handling vagueness or steering pull if pressures are not meticulously tuned
All owner themes in the Discoverer S/T Maxx review

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
All owner themes in the Grabber X3 review

What real owners are saying

From Reddit, forums and review threads. Not part of our score

Tire A

Cooper Discoverer S/T Maxx

Positive

The community generally praises the Cooper Discoverer S/T Maxx for its exceptional dual-purpose performance, offering low road noise and strong traction across various off-road conditions like mud, rocks, and sand. Users note good handling while towing heavy loads, though some mention a slight softness or different feel during cornering that does not negatively impact overall safety. While initial purchase costs can be high, overall satisfaction is very high with many loyal repeat customers.

bobistheoilguy.com ·2019-06-30

“Interesting, I'm considering a Cooper Discoverer A/T3 Sport or Discoverer S/T Maxx in 245/70r16 for my Nissan. All of the reviews are excellent and have been recommended from friends using both types, one on little Suzuki Jimny and one on GC 2.7 diesel. According to them they are great both on pavement and off road, with GC driver being long time off roader.”
r/ToyotaTundra ·2 upvotes ·2026-10-10

“Personally a huge fan of the Cooper Discoverer S/T Maxx great on and offroad. Quite on road.”
duramaxforum.com ·2012-09-10

“I have 285/75-r16 on my f-150 and love them. I've put them through hell (rocks, mud, sand, rim breaking in half and truck skidding down the road on it) and the have held up amazing. My old set of cooper st's last around 60k and still had a little life left. Ill never run any thing but coopers now. and for the record i had that tire checked out by 3 different tire shops and they all said it was fine.”
Top themes
#on and off road traction#low road noise#heavy towing performance#durability and toughness#cornering feel#aggressive appearance

Based on 11 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 S/T Maxx B · General Grabber X3
CategoryAll SeasonMud-Terrain tire
Vehicle typeSUV and 4x4SUV and 4x4
Sizes available306
Rim diameters16″ – 20″16″ – 18″
Tread depth19/32″18 - 21/32″
UTQG—AA A
SidewallBlack Side Wall - Raised Outline White LetteringBlack Side Wall - Serrated Raised Lettering
Max pressure35 - 80 psi35 - 80 psi
Sizes in common66

Which one should you actually buy?

Cooper Discoverer S/T Maxx

General Grabber X3

Narrow edge: Cooper Discoverer S/T Maxx — better dry and wet. Where the General Grabber X3 is ahead, it is by less than 3 points.

Pick tire A You want the most grip on dry roads

Cooper Discoverer S/T Maxx scores 71 vs 68 on dry.

Pick tire A Your priority is wet-weather safety

Cooper Discoverer S/T Maxx scores 72 vs 69 on wet.

Tire A · Cooper Discoverer S/T Maxx
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Tire B · General Grabber X3
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Discoverer S/T Maxx or Grabber X3?

Which is better in the wet, Discoverer S/T Maxx or Grabber X3?

Cooper Discoverer S/T Maxx, 72 vs 69 on our wet score.

Which grips better on dry roads, Discoverer S/T Maxx or Grabber X3?

Cooper Discoverer S/T Maxx, 71 vs 68 on our dry score.

Which is better in snow, Discoverer S/T Maxx or Grabber X3?

Neither, by our numbers: 69 vs 69 on the snow score, within 3 points.

Which is quieter, Discoverer S/T Maxx or Grabber X3?

Neither, by our numbers: 59 vs 59 on the noise score, within 3 points.

Which is more comfortable, Discoverer S/T Maxx or Grabber X3?

Neither, by our numbers: 59 vs 57 on the comfort score, within 3 points.

Which lasts longer, Discoverer S/T Maxx or Grabber X3?

Neither, by our numbers: 66 vs 65 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