88
/ 100
Objective (60%)
–/100
No test data yet
User signal (40%)
88/100
356 owner reviews
Prices change daily — check the retailer for your size.
Head-to-head
Updated September 2026
Cooper Discoverer STT PRO vs General Grabber X3 — Compared (September 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
78
/ 100
Objective (60%)
65/100
2 professional tests
User signal (40%)
87/100
97 owner reviews
Prices change daily — check the retailer for your size.
VerdictWinner: Cooper Discoverer STT PRO — better snow, comfort and dry. Pick the General Grabber X3 if noise matters most to you.
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 STT PRO leads by 16
Why this score
| Source | Discoverer STT PRO | Grabber X3 |
|---|---|---|
| Professional tests (TWG score) | – | 68 |
| Tire Rack owners | 87 | 87 |
| Tyre Reviews owners | 81 | 95 |
| SimpleTire owners | 94 | 97 |
| America's Tire owners | 96 | 94 |
Wet
Score (0–100)
Discoverer STT PRO leads by 1
Why this score
| Source | Discoverer STT PRO | Grabber X3 |
|---|---|---|
| Professional tests (TWG score) | – | 90 |
| Tire Rack owners | 93 | 92 |
| Tyre Reviews owners | 71 | 75 |
| SimpleTire owners | 91 | 91 |
| America's Tire owners | 91 | 90 |
Snow
Score (0–100)
Discoverer STT PRO leads by 43
Why this score
| Source | Discoverer STT PRO | Grabber X3 |
|---|---|---|
| Professional tests (TWG score) | – | 15 |
| Tire Rack owners | 90 | 88 |
| Tyre Reviews owners | 63 | 80 |
| SimpleTire owners | 91 | 90 |
Comfort
Score (0–100)
Discoverer STT PRO leads by 23
Why this score
| Source | Discoverer STT PRO | Grabber X3 |
|---|---|---|
| Professional tests (TWG score) | – | 50 |
| Tire Rack owners | 81 | 84 |
| Tyre Reviews owners | 66 | 85 |
| SimpleTire owners | 89 | 90 |
| America's Tire owners | 88 | 84 |
Noise
Score (0–100)
Grabber X3 leads by 4
Why this score
| Source | Discoverer STT PRO | Grabber X3 |
|---|---|---|
| SimpleTire owners | 79 | 87 |
| America's Tire owners | 78 | 80 |
Treadwear
Score (0–100)
Grabber X3 leads by 1
Why this score
| Source | Discoverer STT PRO | Grabber X3 |
|---|---|---|
| Tire Rack owners | 75 | 80 |
| Tyre Reviews owners | 90 | 95 |
| SimpleTire owners | 84 | 88 |
| America's Tire owners | 87 | 86 |
Handling
Score (0–100)
Discoverer STT PRO leads by 4
Why this score
| Source | Discoverer STT PRO | Grabber X3 |
|---|---|---|
| Tyre Reviews owners | 70 | 90 |
| America's Tire owners | 90 | 85 |
| DriverReviews owners | – | 86 |
Scores at a glance
| Category | Cooper Discoverer STT PRO | General Grabber X3 |
|---|---|---|
| Relative Score | 88 | 78 |
| Dry | 95 | 79 |
| Wet | 91 | 90 |
| Snow | 88 | 45 |
| Comfort | 88 | 65 |
| Noise | 78 | 82 |
| Treadwear | 86 | 87 |
| Handling | 89 | 85 |
Higher is better. The Relative Score follows your weights below; category scores do not change.
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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
88
/ 100
Tire A
78
/ 100
Tire B
From owners
Pros, cons & observations
Themes extracted from owner reviews across retailers and review sites — not the opinion of TireWheelGuide.
Not enough owner reviews yet to extract themes.
The General Grabber X3 is widely regarded as a high-performance mud-terrain tire that balances aggressive off-road capability with surprising on-road refinement. While most users praise its exceptional traction in mud, snow, and rocky terrain, a subset of owners reports issues with highway stability, specifically noting a 'squirrely' or disconnected feeling at higher speeds.
Pros
- Exceptional off-road traction in mud, sand, and rocky conditions
- Surprisingly low road noise for an aggressive mud-terrain tire
- Strong durability and tread life when properly maintained
- Aesthetically pleasing design, particularly the signature red lettering
Cons
- Reported 'steering wander' or instability at highway speeds
- Potential for uneven tread wear (cupping) if not rotated frequently
- High tendency to throw rocks and debris due to aggressive tread pattern
- Occasional reports of manufacturing defects or balancing difficulties
Observations
- Users running E-load range tires on heavy-duty trucks report better sidewall stability and less 'squirm' compared to lighter-duty applications.
- Owners of lifted vehicles and larger tire sizes (e.g., 35-inch) frequently highlight the need for frequent rotation to prevent premature cupping.
- Drivers without fender flares noted significant paint chipping due to the tire's tendency to eject rocks.
Specifications
Specs side by side
| Attribute | A · Cooper Discoverer STT PRO | B · General Grabber X3 |
|---|---|---|
| Category | All Season All Terrain and Off Road tires | All Season All Terrain and Off Road tires |
| Vehicle type | SUV and 4x4 | SUV and 4x4 |
| Sizes available | 23 | 6 |
| Rim diameters | 16″ – 20″ | 16″ – 18″ |
| Tread depth | 18 - 22/32″ | 18 - 21/32″ |
| UTQG | — | AA A |
| Sidewall | Black Side Wall - Raised White Lettering | Black Side Wall - Serrated Raised Lettering |
| Max pressure | 35 - 80 psi | 35 - 80 psi |
Final verdict
Which one should you actually buy?
88
/ 100
Cooper
78
/ 100
General
Winner: Cooper Discoverer STT PRO — better snow, comfort and dry. Pick the General Grabber X3 if noise matters most to you.
Pick tire A
You drive through snowy winters
Cooper Discoverer STT PRO scores 88 vs 45 on snow.
Pick tire A
You want the most comfortable ride
Cooper Discoverer STT PRO scores 88 vs 65 on comfort.
Pick tire A
You want the most grip on dry roads
Cooper Discoverer STT PRO scores 95 vs 79 on dry.
Pick tire A
You enjoy sharp, responsive handling
Cooper Discoverer STT PRO scores 89 vs 85 on handling.
Tire A · Cooper Discoverer STT PRO
Tire B · General Grabber X3
More comparisons
Also compared with
Cooper Discoverer STT PRO also compared with
General Grabber X3 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.