Tests – · none yet Owners 59 · 422 reviews
“New shoes. Cooper Discoverer STT Pro. 285/75/16”
Head-to-head
Updated
Cooper Discoverer STT PRO vs BFGoodrich Mud-Terrain T/A KM3 — 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 422 + 123 owner reviews. How we score
Mud-Terrain T/A KM3 is ahead, 69–64
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Tests – · none yet Owners 69 · 123 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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64
Dry
Mud-Terrain T/A KM3 +468Why this score
Source Discoverer STT PRO Mud-Terrain T/A KM3 Professional tests (TWG score) ≈ 66 (est.) ≈ 68 (est.) Reviews found online 63 68 Discoverer STT PRO: 60% × 65.7 (est.) + 40% × 62.5 = 64
Mud-Terrain T/A KM3: 60% × 68.1 (est.) + 40% × 68.4 = 68
No road tests of dry for Discoverer STT PRO. 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 Mud-Terrain T/A KM3. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.41).
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68
Wet
Mud-Terrain T/A KM3 +573Why this score
Source Discoverer STT PRO Mud-Terrain T/A KM3 Professional tests (TWG score) ≈ 68 (est.) ≈ 73 (est.) Reviews found online 67 74 Discoverer STT PRO: 60% × 68.5 (est.) + 40% × 66.6 = 68
Mud-Terrain T/A KM3: 60% × 72.6 (est.) + 40% × 74.2 = 73
No road tests of wet for Discoverer STT PRO. 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 Mud-Terrain T/A KM3. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).
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67
Snow
Mud-Terrain T/A KM3 +168Why this score
Source Discoverer STT PRO Mud-Terrain T/A KM3 Professional tests (TWG score) ≈ 69 (est.) ≈ 69 (est.) Reviews found online 65 67 Discoverer STT PRO: 60% × 68.6 (est.) + 40% × 64.5 = 67
Mud-Terrain T/A KM3: 60% × 69.3 (est.) + 40% × 66.6 = 68
No road tests of snow for Discoverer STT PRO. 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 Mud-Terrain T/A KM3. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.32).
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54
Comfort
Mud-Terrain T/A KM3 +1266Why this score
Source Discoverer STT PRO Mud-Terrain T/A KM3 Professional tests (TWG score) ≈ 64 (est.) ≈ 68 (est.) Reviews found online 48 65 Discoverer STT PRO: 40% × 64.4 (est.) + 60% × 47.6 = 54
Mud-Terrain T/A KM3: 40% × 67.9 (est.) + 60% × 64.8 = 66
No road tests of comfort for Discoverer STT PRO. 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 Mud-Terrain T/A KM3. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.20).
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53
Noise
Mud-Terrain T/A KM3 +1265Why this score
Source Discoverer STT PRO Mud-Terrain T/A KM3 Professional tests (TWG score) ≈ 66 (est.) ≈ 66 (est.) Reviews found online 32 63 Discoverer STT PRO: 60% × 66.4 (est.) + 40% × 32 = 53
Mud-Terrain T/A KM3: 60% × 66.4 (est.) + 40% × 63.3 = 65
No road tests of noise for Discoverer STT PRO or Mud-Terrain T/A KM3. The test half is the tested tires’ average (66): owners’ noise ratings barely follow the road tests.
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62
Treadwear
Mud-Terrain T/A KM3 +668Why this score
Source Discoverer STT PRO Mud-Terrain T/A KM3 Professional tests (TWG score) ≈ 64 (est.) ≈ 68 (est.) Reviews found online 60 70 Discoverer STT PRO: 60% × 64.1 (est.) + 40% × 59.7 = 62
Mud-Terrain T/A KM3: 60% × 67.7 (est.) + 40% × 69.7 = 68
No road tests of treadwear for Discoverer STT PRO. 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 Mud-Terrain T/A KM3. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.36).
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52
Handling (owners)
No comparison–Why this score
Source Discoverer STT PRO Mud-Terrain T/A KM3 Reviews found online 52 –
Scores at a glance
| Category | Cooper Discoverer STT PRO | BFGoodrich Mud-Terrain T/A KM3 |
|---|---|---|
| Relative Score | 64 | 69 |
| Dry | 64 | 68 |
| Wet | 68 | 73 |
| Snow | 67 | 68 |
| Comfort | 54 | 66 |
| Noise | 53 | 65 |
| Treadwear | 62 | 68 |
| Handling (owners) | 52 | – |
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
Only one of the two tires has a score here, so this weight changes nothing in the head-to-head.
Recomputed
Headline score
64
/ 100
Discoverer STT PRO
69
/ 100
Mud-Terrain T/A KM3
Only categories both tires have data for count toward the headline score.
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
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
What real owners are saying
From Reddit, forums and review threads. Not part of our score
Tire A
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.
r/FJCruiser
·2 upvotes ·2026-03-21
“I thought I'd throw my two cents in! I put 5 Cooper Discoverer STT Pro tires on my 2015 Nissan Xterra Pro-4 X in 2021. It cannot be overstated - I LOVE these tires! They're great in dry conditions, they're great in the rain, they're great in the snow, they're great on ice - they even drove over a frozen iceberg in my driveway during a winter emergency as though it wasn't even there. There's a little bit of road noise, but nothing terrible. You can definitely "feel" them when you're driving - but I kind of like that. My truck sits outside during all kinds of Ohio weather, and they don't appear to be cracking/dry rotting quite yet. It will technically be "due" for me to get a new set of tires next year. Without a doubt, I'm getting another set of these!! Happy trails, all!”
ford-trucks.com
“I run a set of Nankang Mudstar tires on my 94 F350, also overseas cheap MTs. For the price, they are about what you'd expect. Very loud, very rough riding, wear fairly quickly. But they were like $600 shipped to my door for a set of 315/75R16, E load range. On my 89 F350 that I drive more often and pull trailers with, I have a set of Cooper Discoverer STT Pros. Night and day difference, but I can buy 2 sets of Nankangs for the cost of 1 set of Coopers. I don't know that I'd risk cheaper tires on my daily driver though. That being said, I do like the look of those Crosswinds.”
subaruoutback.org
·2023-09-21
“I have never been let down by Cooper Discoverer STT PRO or BFGoodrich KO2 off road tires. I love the traction the Cooper STT PRO give me off-roading in the desert. I drove on KO2 from the 2018 until I got my STT PRO. I had Firestone’s as original equipment on a couple different vehicles and never had so many flats (on road or off road).”
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 |
|---|---|---|
| Category | Mud-Terrain tire | Mud-Terrain tire |
| Vehicle type | SUV and 4x4 | SUV and 4x4 |
| Sizes available | 23 | 27 |
| Rim diameters | 16″ – 20″ | 16″ – 20″ |
| Tread depth | 18 - 22/32″ | 18/32″ |
| Sidewall | Black Side Wall - Raised White Lettering | Raised Black Lettering |
| Max pressure | 35 - 80 psi | 45 - 80 psi |
| Sizes in common | 17 | 17 |
Which one should you actually buy?
64
/ 100
Cooper Discoverer STT PRO
69
/ 100
BFGoodrich Mud-Terrain T/A KM3
Winner: BFGoodrich Mud-Terrain T/A KM3 — better comfort, noise and treadwear. It leads or ties in every category we score.
Pick tire B
You want the most comfortable ride
BFGoodrich Mud-Terrain T/A KM3 scores 66 vs 54 on comfort.
Pick tire B
You want a quieter cabin
BFGoodrich Mud-Terrain T/A KM3 scores 65 vs 53 on noise.
Pick tire B
You want the longest tread life
BFGoodrich Mud-Terrain T/A KM3 scores 68 vs 62 on treadwear.
Pick tire B
Your priority is wet-weather safety
BFGoodrich Mud-Terrain T/A KM3 scores 73 vs 68 on wet.
Tire A · Cooper Discoverer STT PRO
Tire B · BFGoodrich Mud-Terrain T/A KM3
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Discoverer STT PRO or Mud-Terrain T/A KM3?
Which is better in the wet, Discoverer STT PRO or Mud-Terrain T/A KM3?
BFGoodrich Mud-Terrain T/A KM3, 73 vs 68 on our wet score.
Which grips better on dry roads, Discoverer STT PRO or Mud-Terrain T/A KM3?
BFGoodrich Mud-Terrain T/A KM3, 68 vs 64 on our dry score.
Which is better in snow, Discoverer STT PRO or Mud-Terrain T/A KM3?
Neither, by our numbers: 67 vs 68 on the snow score, within 3 points.
Which is quieter, Discoverer STT PRO or Mud-Terrain T/A KM3?
BFGoodrich Mud-Terrain T/A KM3, 65 vs 53 on our noise score.
Which is more comfortable, Discoverer STT PRO or Mud-Terrain T/A KM3?
BFGoodrich Mud-Terrain T/A KM3, 66 vs 54 on our comfort score.
Which lasts longer, Discoverer STT PRO or Mud-Terrain T/A KM3?
BFGoodrich Mud-Terrain T/A KM3, 68 vs 62 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