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Head-to-head Updated

Firestone Transforce AT vs Cooper Discoverer AT3 XLT — Compared

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

Discoverer AT3 XLT is ahead, 76–48

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Tire BCooper

Discoverer AT3 XLT

Premium Touring All Season tire

Tests – · none yet Owners 80 · 800 reviews

“Put some new tires on the XD today. Cooper Discoverer AT3 XLT in 275/70R18. I usually run BFG KO2s on my trucks but wanted to try something different this time.”

Category by category

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

  1. 49

    Dry

    Discoverer AT3 XLT +29
    78
    Why this score
    SourceTransforce ATDiscoverer AT3 XLT
    Reviews found online3984
  2. 46

    Wet

    Discoverer AT3 XLT +34
    80
    Why this score
    SourceTransforce ATDiscoverer AT3 XLT
    Reviews found online3784
  3. 55

    Snow

    Discoverer AT3 XLT +15
    70
    Why this score
    SourceTransforce ATDiscoverer AT3 XLT
    Reviews found online4570
  4. 52

    Comfort

    Discoverer AT3 XLT +22
    74
    Why this score
    SourceTransforce ATDiscoverer AT3 XLT
    Reviews found online3679
  5. 62

    Noise

    Discoverer AT3 XLT +10
    72
    Why this score
    SourceTransforce ATDiscoverer AT3 XLT
    Reviews found online5681
  6. 45

    Treadwear

    Discoverer AT3 XLT +27
    72
    Why this score
    SourceTransforce ATDiscoverer AT3 XLT
    Reviews found online3177
  7. 40

    Handling

    Discoverer AT3 XLT +38
    78
    Why this score
    SourceTransforce ATDiscoverer AT3 XLT
    Reviews found online4078
Scores at a glance
CategoryFirestone Transforce ATCooper Discoverer AT3 XLT
Relative Score 48 76
Dry 49 78
Wet 46 80
Snow 55 70
Comfort 52 74
Noise 62 72
Treadwear 45 72
Handling 40 78

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

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Wet grip and treadwear start at “Important” — the two things buyers rank highest. Move the sliders and the scores update instantly.

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Recomputed
Headline score

Transforce AT

Discoverer AT3 XLT

Pros, cons & observations

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

Tire A Transforce AT

Not enough owner reviews yet to extract themes.

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

Firestone Transforce AT

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/ram_trucks ·27 upvotes ·2024-07-11

“Cooper Discoverer AT3 XLT Picked up a set of Discoverer AT3 XLT from simple tire. With the 4th of July discounts all 4 were under 1k before taxes. I had the AT3 4S on a previous ram and they held up so I’m expecting good things here.”
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.”
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.”
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 · Firestone Transforce AT B · Cooper Discoverer AT3 XLT
Category—Premium Touring All Season tire
Vehicle typeSUV and 4x4SUV and 4x4
Sizes available24
Rim diameters17″ – 20″16″ – 20″
Tread depth17/32″16 - 18/32″
Treadwear warranty—60,000 mi
SidewallBlackwallBlack Side Wall - Raised White Lettering
Max pressure80 psi35 - 80 psi

Which one should you actually buy?

Firestone Transforce AT

Cooper Discoverer AT3 XLT

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

Pick tire B You enjoy sharp, responsive handling

Cooper Discoverer AT3 XLT scores 78 vs 40 on handling.

Pick tire B Your priority is wet-weather safety

Cooper Discoverer AT3 XLT scores 80 vs 46 on wet.

Pick tire B You want the most grip on dry roads

Cooper Discoverer AT3 XLT scores 78 vs 49 on dry.

Pick tire B You want the longest tread life

Cooper Discoverer AT3 XLT scores 72 vs 45 on treadwear.

Tire A · Firestone Transforce AT
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Tire B · Cooper Discoverer AT3 XLT
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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.

76

Leads

Discoverer AT3 XLT

Amazon