Tests – · none yet Owners 50 · 3 reviews
Head-to-head
Updated
Firestone F580 vs Cooper Discoverer AT3 LT — Compared
Relative Score (0–100): 60% professional tests, 40% owner reviews.
Discoverer AT3 LT is ahead, 75–55
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Tests – · none yet Owners 77 · 251 reviews
“From the Cooper site: Discoverer A/T3 55,000 Mile Treadwear Protection - Light Truck sizes 60,000 Mile Treadwear Protection - SUV sizes The Discoverer A/T3™ is an all-season, all-terrain tire designed to perform well on the highway and off for drivers of SUVs and light duty trucks. Excellent highway performance Excellent wet traction Improved treadwear and traction in rocky and gravel terrain M+S Rated Discoverer AT3 LT 60,000 Mile Treadwear Protection - LT-metric sizes The Discoverer AT3 LT™ with Durable Tread Technology™ hauls heavy loads with less wear and are built to withstand ongoing assault from dirt and gravel. Designed to prevent shredding on rocky and gravel terrain Extreme durability for hauling Superior control and braking in wet weather Cutting through the marketing-speak, it sounds like the A/T3 is more road biased and the AT3 LT is perhaps heavier duty and more offroad biased. And the AT3 LT is not rated for winter conditions. I've had Discount Tire try to feed me a load of BS on more than one occasion. It sounds like that's what they were doing to you. The A/T3 is definitely still available.”
Category by category
Relative Score per category, 0–100. Open “Why this score” for the tests and owner ratings behind it.
-
55
Dry
Discoverer AT3 LT +2277Why this score
Source F580 Discoverer AT3 LT Reviews found online 48 83 -
56
Wet
Discoverer AT3 LT +2379Why this score
Source F580 Discoverer AT3 LT Reviews found online 51 82 -
–
Snow
No comparison71Why this score
Source F580 Discoverer AT3 LT Reviews found online – 73 -
59
Comfort
Discoverer AT3 LT +1372Why this score
Source F580 Discoverer AT3 LT Reviews found online 48 75 -
–
Noise
No comparison71Why this score
Source F580 Discoverer AT3 LT Reviews found online – 78 -
58
Treadwear
Discoverer AT3 LT +1371Why this score
Source F580 Discoverer AT3 LT Reviews found online 53 74 -
47
Handling
Discoverer AT3 LT +2370Why this score
Source F580 Discoverer AT3 LT Reviews found online 47 70
Scores at a glance
| Category | Firestone F580 | Cooper Discoverer AT3 LT |
|---|---|---|
| Relative Score | 55 | 75 |
| Dry | 55 | 77 |
| Wet | 56 | 79 |
| Snow | – | 71 |
| Comfort | 59 | 72 |
| Noise | – | 71 |
| Treadwear | 58 | 71 |
| Handling | 47 | 70 |
Higher is better. The Relative Score follows your weights below; category scores do not change.
Weight the categories that matter to you
Wet grip and treadwear start at “Important” — the two things buyers rank highest. Move the sliders and the scores update instantly.
Important
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Important
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Neutral
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Neither tire has a score here yet, so this weight changes nothing.
Less important
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Less important
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Neither tire has a score here yet, so this weight changes nothing.
Important
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Neutral
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Recomputed
Headline score
55
/ 100
F580
75
/ 100
Discoverer AT3 LT
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 F580
Pros
- Strong dry grip and road feedback
- Surprisingly capable performance in snow for a summer-biased tire
- Quiet and smooth ride quality
Cons
- Inconsistent wet-weather traction and safety concerns
- Premature tread wear reported by some owners
- Polarizing performance reliability across different vehicle setups
Tire B Discoverer AT3 LT
Pros
- Excellent towing stability with minimal sidewall flex under heavy loads
- Surprisingly quiet and smooth on the highway for an all-terrain tire
- Strong durability and wear resistance on rough gravel, rock, and dirt roads
Cons
- Subpar performance in heavy snow, ice, or deep mud for some users
- Occasional reports of balancing difficulties or initial cold-weather tire thumping
- Isolated incidents of sidewall splitting or premature wear
What real owners are saying
From Reddit, forums and review threads. Not part of our score
Tire A
Firestone F580
We haven't collected enough community discussion about this tire yet.
Tire B
Mixed
Cooper Discoverer AT3 LT
Community sentiment regarding the Cooper Discoverer AT3 LT is mixed with a positive lean. Drivers appreciate its wet and snow traction, low noise, and strong tread life under heavy loads, though some report irregular wear and persistent balancing or vibration issues after accumulating mileage.
clubfrontier.org
·2 upvotes ·2023-02-26
“I got 80k (rotating every 10k) out of Coopers on my 2010 and have 40k on current 2019 SL ... Discoverer AT3 LT ... they are designed for heavier trucks... excellent noise, excellent in water. I got stuck in a grass field in the factory HT hancocks... same field few years later with coopers.. no issues.. never tried in snow but imagine they would do well...”
hdrams.com
·1 upvote ·2026-01-17
“I ran a set of 295/70r18 Discoverer AT3 LT’s for about 25k miles. I had seen lots of negative reviews but figured that I would be OK with them for my needs ( I drive in snow 4 - 5 times per year). Initially I was happy with the tires as they performed well in the snow and the rain but after 10k miles they developed a balance issue and started to wear irregularly. I had never experienced anything like it before. I actually purchased new shocks but never installed them. As I drive a lot of miles I just never had any time to deal with chasing the vibration / balance issue and just replaced the tires with Bridgestone Dueler AT Ascent. I now have about 20k miles on the Bridgestone’s and they are still ride very smooth and are wearing great.”
wanderthewest.com
·2020-07-08
“I have the Cooper Discoverer AT3 LT tires on my 2010 Tundra with Hawk. They are E series tires. Found this link that discusses the differences between the LT and XLT. Really like my LT's. The increased tire mileage would probably be a good thing of the price difference isn't too great. Paul”
Top themes
#Wet traction performance#Treadwear and longevity#Heavy load handling#Balancing and vibration#Snow traction capability
Based on 5 community posts
Specs side by side
| Attribute | A · Firestone F580 | B · Cooper Discoverer AT3 LT |
|---|---|---|
| Category | Summer Touring tires | Premium Touring All Season tire |
| Vehicle type | Passenger Car / Crossover | SUV and 4x4 |
| Sizes available | — | 14 |
| Rim diameters | — | 16″ – 18″ |
| Tread depth | — | 16 - 17/32″ |
| Treadwear warranty | — | 60,000 mi |
| Sidewall | — | Black Side Wall - Raised Outline White Lettering |
| Max pressure | — | 50 - 80 psi |
Which one should you actually buy?
55
/ 100
Firestone F580
75
/ 100
Cooper Discoverer AT3 LT
Winner: Cooper Discoverer AT3 LT — better wet, handling and dry. It leads or ties in every category we score.
Pick tire B
Your priority is wet-weather safety
Cooper Discoverer AT3 LT scores 79 vs 56 on wet.
Pick tire B
You enjoy sharp, responsive handling
Cooper Discoverer AT3 LT scores 70 vs 47 on handling.
Pick tire B
You want the most grip on dry roads
Cooper Discoverer AT3 LT scores 77 vs 55 on dry.
Pick tire B
You want the most comfortable ride
Cooper Discoverer AT3 LT scores 72 vs 59 on comfort.
Tire A · Firestone F580
Tire B · Cooper Discoverer AT3 LT
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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.