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Cooper Discoverer STT PRO vs BFGoodrich Mud-Terrain T/A KM3 — Compared

Relative Score (0–100): 60% professional tests, 40% owner reviews.

Mud-Terrain T/A KM3 is ahead, 72–63

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Tire ACooper

Discoverer STT PRO

All Season

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.

  1. 65

    Dry

    Mud-Terrain T/A KM3 +7
    72
    Why this score
    SourceDiscoverer STT PROMud-Terrain T/A KM3
    Reviews found online6375
  2. 67

    Wet

    Mud-Terrain T/A KM3 +9
    76
    Why this score
    SourceDiscoverer STT PROMud-Terrain T/A KM3
    Reviews found online6678
  3. 66

    Snow

    Mud-Terrain T/A KM3 +3
    69
    Why this score
    SourceDiscoverer STT PROMud-Terrain T/A KM3
    Reviews found online6469
  4. 61

    Comfort

    Mud-Terrain T/A KM3 +9
    70
    Why this score
    SourceDiscoverer STT PROMud-Terrain T/A KM3
    Reviews found online5271
  5. 54

    Noise

    Mud-Terrain T/A KM3 +12
    66
    Why this score
    SourceDiscoverer STT PROMud-Terrain T/A KM3
    Reviews found online3466
  6. 63

    Treadwear

    Mud-Terrain T/A KM3 +6
    69
    Why this score
    SourceDiscoverer STT PROMud-Terrain T/A KM3
    Reviews found online6271
  7. 54

    Handling

    Mud-Terrain T/A KM3 +22
    76
    Why this score
    SourceDiscoverer STT PROMud-Terrain T/A KM3
    Reviews found online5476
Scores at a glance
CategoryCooper Discoverer STT PROBFGoodrich Mud-Terrain T/A KM3
Relative Score 63 72
Dry 65 72
Wet 67 76
Snow 66 69
Comfort 61 70
Noise 54 66
Treadwear 63 69
Handling 54 76

Higher is better. The Relative Score follows your weights below; category scores do not change.

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Headline score

Discoverer STT PRO

Mud-Terrain T/A KM3

Pros, cons & observations

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

Tire A 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
All owner themes in the Discoverer STT PRO review

Tire B Mud-Terrain T/A KM3

Pros

  • Outstanding off-road and mud traction
  • Surprisingly quiet and comfortable on the highway for a mud-terrain tire
  • Impressive tread wear and longevity

Cons

  • Do not perform quite as well as dedicated road tires during on-road driving
All owner themes in the Mud-Terrain T/A KM3 review

What real owners are saying

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

Tire A

Cooper Discoverer STT PRO

Positive

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

Tire B

BFGoodrich Mud-Terrain T/A KM3

We haven't collected enough community discussion about this tire yet.

Specs side by side

Attribute A · Cooper Discoverer STT PRO B · BFGoodrich Mud-Terrain T/A KM3
CategoryAll SeasonAll Terrain and Off Road All Season tire
Vehicle typeSUV and 4x4SUV and 4x4
Sizes available2327
Rim diameters16″ – 20″16″ – 20″
Tread depth18 - 22/32″18/32″
SidewallBlack Side Wall - Raised White LetteringRaised Black Lettering
Max pressure35 - 80 psi45 - 80 psi

Which one should you actually buy?

Cooper Discoverer STT PRO

BFGoodrich Mud-Terrain T/A KM3

Winner: BFGoodrich Mud-Terrain T/A KM3 — better handling, noise and wet. It leads or ties in every category we score.

Pick tire B You enjoy sharp, responsive handling

BFGoodrich Mud-Terrain T/A KM3 scores 76 vs 54 on handling.

Pick tire B You want a quieter cabin

BFGoodrich Mud-Terrain T/A KM3 scores 66 vs 54 on noise.

Pick tire B Your priority is wet-weather safety

BFGoodrich Mud-Terrain T/A KM3 scores 76 vs 67 on wet.

Pick tire B You want the most comfortable ride

BFGoodrich Mud-Terrain T/A KM3 scores 70 vs 61 on comfort.

Tire A · Cooper Discoverer STT PRO
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Tire B · BFGoodrich Mud-Terrain T/A KM3
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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.

72

Leads

Mud-Terrain T/A KM3

Amazon