tirewheelguide
Head-to-head Updated

BFGoodrich Mud-Terrain T/A KM2 vs Cooper Discoverer AT3 XLT — 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 44 + 800 owner reviews. How we score

Discoverer AT3 XLT is ahead, 78–66

Check price on Amazon · Discoverer AT3 XLT or Mud-Terrain T/A KM2 on Amazon
Add your size for an exact match
/R

Both Amazon links then search this exact size.

TireWheelGuide may earn a commission from purchases made through these links.

Cooper Discoverer AT3 XLT
Tire BCooper

Discoverer AT3 XLT

All-Terrain tire

± 7

Tests – · none yet Owners 82 · 800 reviews

“New shoes this week, Cooper Discoverer At3 XLT. I’m really impressed so far.”

Category by category

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

  1. 66

    Dry

    Discoverer AT3 XLT +13
    79
    Why this score
    SourceMud-Terrain T/A KM2Discoverer AT3 XLT
    Professional tests (TWG score)≈ 67 (est.)≈ 75 (est.)
    Reviews found online6686

    Mud-Terrain T/A KM2: 60% × 67 (est.) + 40% × 65.7 = 66

    Discoverer AT3 XLT: 60% × 75.3 (est.) + 40% × 85.5 = 79

    No road tests of dry for Mud-Terrain T/A KM2. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.42).

    No road tests of dry for Discoverer AT3 XLT. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.42).

  2. 67

    Wet

    Discoverer AT3 XLT +16
    83
    Why this score
    SourceMud-Terrain T/A KM2Discoverer AT3 XLT
    Professional tests (TWG score)≈ 68 (est.)≈ 80 (est.)
    Reviews found online6687

    Mud-Terrain T/A KM2: 60% × 68 (est.) + 40% × 65.8 = 67

    Discoverer AT3 XLT: 60% × 79.9 (est.) + 40% × 87.3 = 83

    No road tests of wet for Mud-Terrain T/A KM2. 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 Discoverer AT3 XLT. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).

  3. 68

    Snow

    Discoverer AT3 XLT +3
    71
    Why this score
    SourceMud-Terrain T/A KM2Discoverer AT3 XLT
    Professional tests (TWG score)≈ 69 (est.)≈ 71 (est.)
    Reviews found online6572

    Mud-Terrain T/A KM2: 60% × 68.9 (est.) + 40% × 65.4 = 68

    Discoverer AT3 XLT: 60% × 71 (est.) + 40% × 71.9 = 71

    No road tests of snow for Mud-Terrain T/A KM2. 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 Discoverer AT3 XLT. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.32).

  4. 66

    Comfort

    Discoverer AT3 XLT +11
    77
    Why this score
    SourceMud-Terrain T/A KM2Discoverer AT3 XLT
    Professional tests (TWG score)≈ 68 (est.)≈ 71 (est.)
    Reviews found online6580

    Mud-Terrain T/A KM2: 40% × 68 (est.) + 60% × 65.1 = 66

    Discoverer AT3 XLT: 40% × 71.1 (est.) + 60% × 80.3 = 77

    No road tests of comfort for Mud-Terrain T/A KM2. 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 Discoverer AT3 XLT. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.20).

  5. 59

    Noise

    Discoverer AT3 XLT +14
    73
    Why this score
    SourceMud-Terrain T/A KM2Discoverer AT3 XLT
    Professional tests (TWG score)≈ 66 (est.)≈ 66 (est.)
    Reviews found online4982

    Mud-Terrain T/A KM2: 60% × 66.3 (est.) + 40% × 48.5 = 59

    Discoverer AT3 XLT: 60% × 66.3 (est.) + 40% × 82.3 = 73

    No road tests of noise for Mud-Terrain T/A KM2 or Discoverer AT3 XLT. The test half is the tested tires’ average (66): owners’ noise ratings barely follow the road tests.

  6. 67

    Treadwear

    Discoverer AT3 XLT +7
    74
    Why this score
    SourceMud-Terrain T/A KM2Discoverer AT3 XLT
    Professional tests (TWG score)≈ 67 (est.)≈ 71 (est.)
    Reviews found online6779

    Mud-Terrain T/A KM2: 60% × 66.8 (est.) + 40% × 67.2 = 67

    Discoverer AT3 XLT: 60% × 71.1 (est.) + 40% × 79.4 = 74

    No road tests of treadwear for Mud-Terrain T/A KM2. 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 Discoverer AT3 XLT. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.36).

  7. 68

    Handling (owners)

    Discoverer AT3 XLT +10
    78
    Why this score
    SourceMud-Terrain T/A KM2Discoverer AT3 XLT
    Reviews found online6878
Scores at a glance
CategoryBFGoodrich Mud-Terrain T/A KM2Cooper Discoverer AT3 XLT
Relative Score 66 78
Dry 66 79
Wet 67 83
Snow 68 71
Comfort 66 77
Noise 59 73
Treadwear 67 74
Handling (owners) 68 78

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
Recomputed
Headline score
± 7

Mud-Terrain T/A KM2

± 7

Discoverer AT3 XLT

Pros, cons & observations

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

Tire A Mud-Terrain T/A KM2

Pros

  • Aggressive and appealing visual aesthetic with iconic sidewall design
  • Exceptional off-road traction in mud, gravel, sand, and snow
  • Surprisingly low road noise for a mud-terrain tire, especially when new

Cons

  • Develops a louder highway hum or 'whine' as mileage increases
  • Can experience reduced traction or oversteer on wet pavement for some drivers
  • Occasional tendency to spin on loose dry rock rather than bite
All owner themes in the Mud-Terrain T/A KM2 review

Tire B Discoverer AT3 XLT

Pros

  • Significantly lower road noise than comparable aggressive all-terrain tires
  • Excellent wet weather, snow, and slush traction
  • Sturdy sidewalls and stable performance when towing heavy loads

Cons

  • Some users report difficulty with balancing, leading to vibrations or a rough ride
  • Tread life occasionally falls short of expectations for certain drivers
  • Can struggle or get gummed up in deep mud
All owner themes in the Discoverer AT3 XLT review

What real owners are saying

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

Tire A

BFGoodrich Mud-Terrain T/A KM2

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

Tire B

Cooper Discoverer AT3 XLT

Positive

Community members report high satisfaction with the Cooper Discoverer AT3 XLT, highlighting its quiet ride, long tread life, and strong winter performance. Several owners praise its smooth ride quality and durability under towing conditions compared to rival all-terrain tires. Discussion also commonly centers around sizing, fitment, and snow ratings.

r/overlanding ·2 upvotes ·2026-09-28

“Cooper adventurer (pep boys exclusive version of the discoverer), and then Cooper discoverer at3 xlt have been the tires on my tundra for the last +10yrs. I have put 80-100k on each set. I tow a smaller camp trailer regularly. They discontinued that tire, so I'm going to try the stronghold AT next.”
f150forum.com

“Quote: Originally Posted by SodiumMonkey Thanks for the reply. I actually read through your entire build thread last night. Wow. Awesome stuff there. I’m planning on keeping the OEM Platinum trim 20” wheels. So I could run the Discoverer AT3 XLT 275/65 R20 without any rub at all with either a 2” spacer level or something like this kit from Fox? I don’t want to trim anything and don’t want any rub even when suspension is flexed. It seems like most info online indicates a 33” tire is the max for a 2” level and no rubbing. I believe the 275/65 R20 is a 34” tire. Thanks for the advice! I only ever rubbed with my 285/65R20s when I was reversing and turning right down an angled driveway, on the street and flat ground it never rubbed. Offroad is where I had the most rubbing but that is expected. A 275/65R20 is what a lot of people run with only a 2 inch level. It fills the wheel wells nice and it will very rarely rub in any on road circumstance, no matter how you level the truck. A 33" tire is too small in my personal opinion.”
cumminsforum.com ·2024-08-31

“I figure any tire review is good, even if late. I'm nearing the end of use for Cooper Discoverer AT3 XLT in LT275/70R18E 125S on OE 18x8" chrome clad wheels. They have been fantastic tires , great in the snow, quiet, never felt like they were giving up any traction except for the fourth (last) winter, but they never felt dangerous. They wore dead flat across the tread, kept the fronts at 65# and rears at 75#, rotated about every 5k miles, used Thuren alignment specs. They made 50k miles (the warranty in 2020) no problem. I have no problem getting them again or recommending them, but I like trying something different. If the different tires I chose this time don't work out (45 days), I'll just get these Coopers again.”
Top themes
#low road noise#tread longevity and wear#snow and winter traction#tire sizing and fitment#ride quality and comfort#towing performance

Based on 13 community posts

Specs side by side

Attribute A · BFGoodrich Mud-Terrain T/A KM2 B · Cooper Discoverer AT3 XLT
CategoryMud-Terrain tireAll-Terrain tire
Vehicle typeSUV and 4x4SUV and 4x4
Sizes available14
Rim diameters17″16″ – 20″
Tread depth17 - 20/32″16 - 18/32″
Treadwear warranty—60,000 mi
SidewallBlack Side Wall - Raised White LetteringBlack Side Wall - Raised White Lettering
Max pressure50 - 65 psi35 - 80 psi

Which one should you actually buy?

BFGoodrich Mud-Terrain T/A KM2

Cooper Discoverer AT3 XLT

Winner: Cooper Discoverer AT3 XLT — better wet, noise and dry. It leads or ties in every category we score.

Pick tire B Your priority is wet-weather safety

Cooper Discoverer AT3 XLT scores 83 vs 67 on wet.

Pick tire B You want a quieter cabin

Cooper Discoverer AT3 XLT scores 73 vs 59 on noise.

Pick tire B You want the most grip on dry roads

Cooper Discoverer AT3 XLT scores 79 vs 66 on dry.

Pick tire B You want the most comfortable ride

Cooper Discoverer AT3 XLT scores 77 vs 66 on comfort.

Tire A · BFGoodrich Mud-Terrain T/A KM2
Check price on Amazon
Tire B · Cooper Discoverer AT3 XLT
Check price on Amazon

TireWheelGuide may earn a commission from purchases made through these links.

Mud-Terrain T/A KM2 or Discoverer AT3 XLT?

Which is better in the wet, Mud-Terrain T/A KM2 or Discoverer AT3 XLT?

Cooper Discoverer AT3 XLT, 83 vs 67 on our wet score.

Which grips better on dry roads, Mud-Terrain T/A KM2 or Discoverer AT3 XLT?

Cooper Discoverer AT3 XLT, 79 vs 66 on our dry score.

Which is better in snow, Mud-Terrain T/A KM2 or Discoverer AT3 XLT?

Cooper Discoverer AT3 XLT, 71 vs 68 on our snow score.

Which is quieter, Mud-Terrain T/A KM2 or Discoverer AT3 XLT?

Cooper Discoverer AT3 XLT, 73 vs 59 on our noise score.

Which is more comfortable, Mud-Terrain T/A KM2 or Discoverer AT3 XLT?

Cooper Discoverer AT3 XLT, 77 vs 66 on our comfort score.

Which lasts longer, Mud-Terrain T/A KM2 or Discoverer AT3 XLT?

Cooper Discoverer AT3 XLT, 74 vs 67 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