Tests – · 1 test Owners 74 · 94 reviews
Head-to-head
Updated
Pirelli Scorpion All Terrain Plus vs Cooper Discoverer STT PRO — Compared
Relative Score (0–100): 60% professional tests, 40% owner reviews.
Scorpion All Terrain Plus is ahead, 72–63
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Tests – · none yet Owners 60 · 421 reviews
“Installed the stt pro's on the 10 duramax , so far I really like the tires . Put them to the test backcountry camping (towing 5th wheel) & they were good in the mud & towing. They arent the quietest tires , but did quiet down after some miles. Comparable in noise to the trail grapplers or slightly louder, they weren't squirmy when new, unlike the trailer grapplers I had on my old dodge diesel for the 1st few hundred miles Sent from AutoGuide.com Free App”
Category by category
Relative Score per category, 0–100. Open “Why this score” for the tests and owner ratings behind it.
-
72
Dry
Scorpion All Terrain Plus +765Why this score
Source Scorpion All Terrain Plus Discoverer STT PRO Reviews found online 74 63 -
77
Wet
Scorpion All Terrain Plus +1067Why this score
Source Scorpion All Terrain Plus Discoverer STT PRO Reviews found online 80 66 -
73
Snow
Scorpion All Terrain Plus +766Why this score
Source Scorpion All Terrain Plus Discoverer STT PRO Reviews found online 75 64 -
71
Comfort
Scorpion All Terrain Plus +1061Why this score
Source Scorpion All Terrain Plus Discoverer STT PRO Reviews found online 73 52 -
67
Noise
Scorpion All Terrain Plus +1354Why this score
Source Scorpion All Terrain Plus Discoverer STT PRO Reviews found online 69 34 -
68
Treadwear
Scorpion All Terrain Plus +563Why this score
Source Scorpion All Terrain Plus Discoverer STT PRO Professional tests (TWG score) 66 – Reviews found online 70 62 -
76
Handling
Scorpion All Terrain Plus +2254Why this score
Source Scorpion All Terrain Plus Discoverer STT PRO Reviews found online 76 54
Scores at a glance
| Category | Pirelli Scorpion All Terrain Plus | Cooper Discoverer STT PRO |
|---|---|---|
| Relative Score | 72 | 63 |
| Dry | 72 | 65 |
| Wet | 77 | 67 |
| Snow | 73 | 66 |
| Comfort | 71 | 61 |
| Noise | 67 | 54 |
| Treadwear | 68 | 63 |
| Handling | 76 | 54 |
Higher is better. The Relative Score follows your weights below; category scores do not change.
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Recomputed
Headline score
72
/ 100
Scorpion All Terrain Plus
63
/ 100
Discoverer STT PRO
Pros, cons & observations
Themes extracted from owner reviews found online — not the opinion of TireWheelGuide.
Tire A Scorpion All Terrain Plus
Pros
- Exceptional wet, mud, and winter/snow traction (3-peak mountain snowflake certified)
- Surprisingly quiet and smooth ride on the highway compared to aggressive competitors
- Aggressive, attractive sidewall and tread styling that enhances vehicle appearance
Cons
- Some users reported persistent balancing issues or vibrations at highway speeds
- A few drivers noted increased road noise or uneven shoulder wear as the tires aged
- Minor reduction in fuel economy reported by some truck and SUV owners
Tire B Discoverer STT PRO
Pros
- Outstanding off-road traction in mud, rocks, and dirt
- Surprisingly low road noise and smooth ride for a mud-terrain tire
- Aggressive and appealing visual design with tough sidewalls
Cons
- Can be difficult to balance properly, leading to vibrations for some users
- Faster tread wear reported by a subset of drivers under heavy use
- Reduced traction in specific conditions like deep sand or packed snow/ice
What real owners are saying
From Reddit, forums and review threads. Not part of our score
Tire A
Pirelli Scorpion All Terrain Plus
We haven't collected enough community discussion about this tire yet.
Tire B
Positive
Cooper Discoverer STT PRO
Community members widely praise the Cooper Discoverer STT PRO for its exceptional off-road traction, towing capability, and dependable handling in mud, rain, and snow. While users note it balances well and rides comfortably for a mud-terrain tire, the most common criticisms involve pavement road noise that increases with wear and concerns regarding tread life on heavy trucks.
powerstroke.org
·2022-04-14
“I have used Cooper Discoverer STT Pro's in mud, rain, snow, ice, sand, etc. They have performed just fine in each. They are a bit louder on the highway, but it's not that noticable. -jokester”
ford-trucks.com
“I had a set in 295/70R18. The first 50% was good all around. However they got really noisy as they wore to the point you couldn't hold a conversation in the cab. At that point they had to go.”
therangerstation.com
·1 upvote ·2019-09-30
“They (Cooper Discover SST Pro's) are louder than an all season for sure but not louder than my Buckshots that I ran years ago. A friend has them on his truck, '08 Ford F250 Super Duty diesel, his only complaint is how loud they were for him since the truck drives on pavement most times except on a construction site. I have driven this truck numerous times and the Cooper SST pro's have great traction both on and off road but seem, IMO, to wear quickly on pavement, for the reasons Jim Oaks mentioned, so He will not get them for his application again.... Wish they made them in my size though. So in short I agree with Jim that these are a good tire especially for its intended application.”
Top themes
#off-road traction#highway road noise#mud and snow performance#tread wear life#heavy truck towing#balancing and ride quality
Based on 38 community posts
Specs side by side
| Attribute | A · Pirelli Scorpion All Terrain Plus | B · Cooper Discoverer STT PRO |
|---|---|---|
| Category | — | All Season |
| Vehicle type | SUV and 4x4 | SUV and 4x4 |
| Sizes available | 29 | 23 |
| Rim diameters | 16″ – 20″ | 16″ – 20″ |
| Tread depth | 12 - 16/32″ | 18 - 22/32″ |
| UTQG | 640 A B | — |
| Treadwear warranty | 50,000 mi | — |
| Sidewall | Black Side Wall - Raised White Lettering | Black Side Wall - Raised White Lettering |
| Max pressure | 44 - 80 psi | 35 - 80 psi |
Which one should you actually buy?
72
/ 100
Pirelli Scorpion All Terrain Plus
63
/ 100
Cooper Discoverer STT PRO
Winner: Pirelli Scorpion All Terrain Plus — better handling, noise and wet. It leads or ties in every category we score.
Pick tire A
You enjoy sharp, responsive handling
Pirelli Scorpion All Terrain Plus scores 76 vs 54 on handling.
Pick tire A
You want a quieter cabin
Pirelli Scorpion All Terrain Plus scores 67 vs 54 on noise.
Pick tire A
Your priority is wet-weather safety
Pirelli Scorpion All Terrain Plus scores 77 vs 67 on wet.
Pick tire A
You want the most comfortable ride
Pirelli Scorpion All Terrain Plus scores 71 vs 61 on comfort.
Tire A · Pirelli Scorpion All Terrain Plus
Tire B · Cooper Discoverer STT PRO
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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.
Community buzz from Reddit and forums is shown for context only — it never changes the score.