94
/ 100
Objective (60%)
–/100
No test data yet
User signal (40%)
94/100
416 owner reviews
Prices change daily — check the retailer for your size.
Head-to-head
Updated September 2026
Cooper Discoverer AT3 4S vs Michelin Defender LTX M/S — Compared (September 2026)
Our Relative Score blends 60% objective test data with 40% owner-review signal — so any two tires can be compared even if they were never tested on the same day.
VS
95
/ 100
Objective (60%)
–/100
No test data yet
User signal (40%)
95/100
109 owner reviews
Prices change daily — check the retailer for your size.
VerdictToo close to call: Cooper Discoverer AT3 4S and Michelin Defender LTX M/S are within 2 points overall. Cooper Discoverer AT3 4S is stronger on snow. Michelin Defender LTX M/S is stronger on treadwear and noise.
Read full
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Category breakdown
7 categories, side by side
Each bar is the Relative Score for that category. Expand a tile to see the test results and owner ratings behind it.
Dry
Score (0–100)
Defender LTX M/S leads by 1
Why this score
| Source | Discoverer AT3 4S | Defender LTX M/S |
|---|---|---|
| Tire Rack owners | – | 92 |
| Tyre Reviews owners | 84 | 94 |
| America's Tire owners | 98 | – |
Wet
Score (0–100)
Why this score
| Source | Discoverer AT3 4S | Defender LTX M/S |
|---|---|---|
| Tire Rack owners | – | 83 |
| Tyre Reviews owners | 81 | 91 |
| America's Tire owners | 96 | – |
Snow
Score (0–100)
Discoverer AT3 4S leads by 8
Why this score
| Source | Discoverer AT3 4S | Defender LTX M/S |
|---|---|---|
| Tire Rack owners | – | 94 |
| Tyre Reviews owners | 86 | 80 |
Comfort
Score (0–100)
Defender LTX M/S leads by 1
Why this score
| Source | Discoverer AT3 4S | Defender LTX M/S |
|---|---|---|
| Tire Rack owners | – | 84 |
| Tyre Reviews owners | 82 | 87 |
| America's Tire owners | 95 | – |
Noise
Score (0–100)
Defender LTX M/S leads by 3
Why this score
| Source | Discoverer AT3 4S | Defender LTX M/S |
|---|---|---|
| America's Tire owners | 92 | – |
Treadwear
Score (0–100)
Defender LTX M/S leads by 5
Why this score
| Source | Discoverer AT3 4S | Defender LTX M/S |
|---|---|---|
| Tire Rack owners | – | 92 |
| Tyre Reviews owners | 69 | 97 |
| America's Tire owners | 93 | – |
Handling
Score (0–100)
Defender LTX M/S leads by 1
Why this score
| Source | Discoverer AT3 4S | Defender LTX M/S |
|---|---|---|
| Tyre Reviews owners | 78 | 85 |
| America's Tire owners | 96 | – |
Scores at a glance
| Category | Cooper Discoverer AT3 4S | Michelin Defender LTX M/S |
|---|---|---|
| Relative Score | 94 | 95 |
| Dry | 97 | 98 |
| Wet | 96 | 96 |
| Snow | 90 | 82 |
| Comfort | 95 | 96 |
| Noise | 92 | 95 |
| Treadwear | 92 | 97 |
| Handling | 96 | 97 |
Higher is better. The Relative Score follows your weights below; category scores do not change.
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Neutral
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Recomputed
Headline score
94
/ 100
Tire A
95
/ 100
Tire B
From owners
Pros, cons & observations
Themes extracted from owner reviews across retailers and review sites — not the opinion of TireWheelGuide.
Not enough owner reviews yet to extract themes.
The Michelin Defender LTX M/S is widely regarded as a premier all-season tire for trucks and SUVs, consistently praised for its exceptional tread longevity and balanced performance across various weather conditions. While the vast majority of users report superior ride comfort, stability, and fuel efficiency, a small minority of owners have noted issues with increased road noise as the tires age or inconsistent traction in specific wet-weather scenarios.
Pros
- Exceptional tread life often exceeding 60,000–80,000 miles
- Strong all-weather traction, particularly in dry and light snow conditions
- Improved fuel efficiency due to low rolling resistance
- High level of ride comfort and stability for heavy vehicles
- Reliable performance that often outperforms original equipment (OE) tires
Cons
- Increased road noise reported by some users as the tire tread wears down
- Higher price point compared to competitors
- Occasional reports of reduced wet-weather grip or traction loss during turns
- Limited off-road capability in mud or deep sand
Observations
- Heavy-duty truck owners (RAM 2500/3500) report high satisfaction with durability, even under heavy usage or towing conditions.
- SUV owners (Expedition, Highlander) frequently cite the tire as a significant upgrade over factory-installed rubber, specifically noting improvements in cabin quietness and fuel economy.
- Users recommend running higher tire pressures (40-45 psi) to optimize performance and handling on certain truck platforms.
Community buzz
What real owners are saying
From Reddit, forums and review threads. Not part of our score
Tire A
Positive
Cooper Discoverer AT3 4S
The Cooper Discoverer AT3 4S is widely praised by the community for its quiet and comfortable highway ride, excellent wet and snow traction, and solid fuel efficiency. Drivers appreciate its balance of rugged aesthetics and daily drivability, though recent discussions highlight growing concerns over reported product discontinuations and sizing shortages.
r/HondaElement
·74 upvotes ·2021-02-15
“Got some 225/75/16 Cooper Discoverer AT3 4s - Great fit on stock setup.”
r/4x4
·12 upvotes ·2026-07-08
“They Discontinued My Tire! I've been using Cooper Discoverer AT3 4s forever. For some reason Cooper, in it's infinite wisdom, has discontinued the 265 75r 16 size so I need a replacment. I'm in Southern California and do quite a bit of wildlife habitat restoration work in dry desert conditions. This involves lots and lots of highway miles as well as dirt roads from good to, on what planet is this a road. Occasionally we are even driving up dry washes, trying to avoid all the nasty sidewall eating rocks and spiny bushes. The tread on the discoverer is pretty modest and quite on the highway but when aired downed, runs well in sandy conditions. They even work pretty well in rocky conditions. The other thing is they wear really well. Ive got 60k+ miles on my current set and can squeeze another 10k out of them if I have to. So to the point, Im looking for suggestions for a replacment. Any help would be greatly appreciated.”
r/JeepRenegade
·6 upvotes ·2020-08-24
“New tires: Cooper Discoverer AT3 4S Needed a 3PMSF tire and these Coopers edged out the Wildpeak AT3Ws based on wear rating and highway performance. Also, Cooper has a promo right now for a $70 mail in rebate. MPG has been about the same, maybe slightly better. Visually, I like them, more rugged than the stock Falkens. Highway and forest road driving has been solid. Stock size, 215/65R17, on a 2020 TH: Read more”
r/tires
·3 upvotes ·2026-05-26
“New tire advice from people who know about cooper Ive had these discoverer at3 4s since 2022. I need to replace them and ive heard they stopped making them. Before this it had discoverer RTX and discoverer LSX tires. The ones people are saying kinda took over are the road and trail AT but they look way more offroad styled then the at3s did. I dont drive offroad but i dont want strictly highway tires. I do drive on the highway though and haul a bit does cooper have anything else or is the road and trail AT a good replacement? Read more”
Top themes
#Highway performance and low noise#Wet and snow traction#Tread wear and longevity#Availability and discontinuation rumors#Light off-road capability#Fuel economy and MPG
Based on 15 community posts
Tire B
Michelin Defender LTX M/S
We haven't collected enough community discussion about this tire yet.
Specifications
Specs side by side
| Attribute | A · Cooper Discoverer AT3 4S | B · Michelin Defender LTX M/S |
|---|---|---|
| Category | Premium Touring All Season tire | Premium Touring All Season tire |
| Vehicle type | SUV and 4x4 | SUV and 4x4 |
| Tread depth | 12 - 14/32″ | — |
| UTQG | 620 A B | — |
| Treadwear warranty | 65,000 mi | — |
| Sidewall | Black Side Wall - Raised Outline White Lettering | — |
| Max pressure | 44 - 50 psi | — |
Final verdict
Which one should you actually buy?
94
/ 100
Cooper
95
/ 100
Michelin
Too close to call: Cooper Discoverer AT3 4S and Michelin Defender LTX M/S are within 2 points overall. Cooper Discoverer AT3 4S is stronger on snow. Michelin Defender LTX M/S is stronger on treadwear and noise.
Pick tire A
You drive through snowy winters
Cooper Discoverer AT3 4S scores 90 vs 82 on snow.
Pick tire B
You want the longest tread life
Michelin Defender LTX M/S scores 97 vs 92 on treadwear.
Pick tire B
You want a quieter cabin
Michelin Defender LTX M/S scores 95 vs 92 on noise.
Tire A · Cooper Discoverer AT3 4S
Tire B · Michelin Defender LTX M/S
More comparisons
Also compared with
Cooper Discoverer AT3 4S also compared with
Michelin Defender LTX M/S also compared with
How do we compare tires?
Every category score blends two independent signals. 60% comes from professional tire tests (braking distances, lap times, noise measurements) normalized against the best tire in each test and weighted toward recent tests. 40% comes from thousands of owner reviews collected from retailers and review sites. When a tire has only one of the two, we use what exists and say so.
Community buzz from Reddit and forums is shown for context only — it never changes the score.