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.”
Head-to-head
Updated
Cooper Discoverer AT3 XLT vs Cooper WeatherMaster SA2+ — Compared
Relative Score (0–100): 60% professional tests, 40% owner reviews.
Discoverer AT3 XLT is ahead, 77–59
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Tests 59 · 6 tests Owners 61 · 6 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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80
Dry
Discoverer AT3 XLT +2555Why this score
Source Discoverer AT3 XLT WeatherMaster SA2+ Professional tests (TWG score) – 56 Reviews found online 86 54 -
80
Wet
Discoverer AT3 XLT +674Why this score
Source Discoverer AT3 XLT WeatherMaster SA2+ Professional tests (TWG score) – 78 Reviews found online 83 67 -
71
Snow
Discoverer AT3 XLT +1457Why this score
Source Discoverer AT3 XLT WeatherMaster SA2+ Professional tests (TWG score) – 50 Reviews found online 71 68 -
74
Comfort
Discoverer AT3 XLT +767Why this score
Source Discoverer AT3 XLT WeatherMaster SA2+ Reviews found online 80 64 -
73
Noise
Discoverer AT3 XLT +1261Why this score
Source Discoverer AT3 XLT WeatherMaster SA2+ Professional tests (TWG score) – 56 Reviews found online 81 – -
73
Treadwear
Discoverer AT3 XLT +1954Why this score
Source Discoverer AT3 XLT WeatherMaster SA2+ Professional tests (TWG score) – 47 Reviews found online 77 64 -
79
Handling
Discoverer AT3 XLT +3049Why this score
Source Discoverer AT3 XLT WeatherMaster SA2+ Reviews found online 79 49
Scores at a glance
| Category | Cooper Discoverer AT3 XLT | Cooper WeatherMaster SA2+ |
|---|---|---|
| Relative Score | 77 | 59 |
| Dry | 80 | 55 |
| Wet | 80 | 74 |
| Snow | 71 | 57 |
| Comfort | 74 | 67 |
| Noise | 73 | 61 |
| Treadwear | 73 | 54 |
| Handling | 79 | 49 |
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.
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Recomputed
Headline score
77
/ 100
Discoverer AT3 XLT
59
/ 100
WeatherMaster SA2+
Pros, cons & observations
Themes extracted from owner reviews found online — not the opinion of TireWheelGuide.
Tire A 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
Tire B WeatherMaster SA2+
Pros
- Exceptional value and reasonable pricing for the performance delivered
- Great grip and stability in wet and cold conditions
- High durability offering minimal wear over long distances
Cons
- Vague road feedback and unsettling handling during fast cornering
- Average performance in deep snow and on ice
- Tendency to overheat and lose grip during spirited dry driving
What real owners are saying
From Reddit, forums and review threads. Not part of our score
Tire A
Positive
Cooper Discoverer AT3 XLT
Community opinion of the Cooper Discoverer AT3 XLT is overwhelmingly positive, with users frequently praising its smooth ride quality, exceptional quietness on the highway, and long-term durability compared to competitors like BFG KO2 and Toyo Open Country. Drivers also appreciate its solid value and performance when towing. A few users occasionally confuse the M+S marking with the Three-Peak Mountain Snowflake rating for severe winter conditions.
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.”
r/ram_trucks
·22 upvotes ·2021-11-19
“New Cooper Discoverer AT3 XLT 275/75R20 these ride way better than my old Open Country A/T II”
r/Trucks
·3 upvotes ·2021-03-26
“Are my Discoverer AT3 XLT snow rated? Going snowboarding and roads require snow tires or chains /cables. I was looking at the sidewall of my Cooper Discoverer XLT and saw there is a small M+S next to the tire size. Is it stupid to assume these are snow rated? I'm not trying to get a ticket for not having chains if I need them, which most places seem to be sold out locally.”
Top themes
#ride comfort#low road noise#tread longevity#winter and snow ratings#comparison to competitors#pricing and value#towing performance
Based on 8 community posts
Tire B
Cooper WeatherMaster SA2+
We haven't collected enough community discussion about this tire yet.
Specs side by side
| Attribute | A · Cooper Discoverer AT3 XLT | B · Cooper WeatherMaster SA2+ |
|---|---|---|
| Category | Premium Touring All Season tire | Touring Winter tire |
| Vehicle type | SUV and 4x4 | Passenger Car / Crossover |
| Sizes available | 4 | — |
| Rim diameters | 16″ – 20″ | — |
| Tread depth | 16 - 18/32″ | — |
| Treadwear warranty | 60,000 mi | — |
| Sidewall | Black Side Wall - Raised White Lettering | — |
| Max pressure | 35 - 80 psi | — |
Which one should you actually buy?
77
/ 100
Cooper Discoverer AT3 XLT
59
/ 100
Cooper WeatherMaster SA2+
Winner: Cooper Discoverer AT3 XLT — better handling, dry and treadwear. It leads or ties in every category we score.
Pick tire A
You enjoy sharp, responsive handling
Cooper Discoverer AT3 XLT scores 79 vs 49 on handling.
Pick tire A
You want the most grip on dry roads
Cooper Discoverer AT3 XLT scores 80 vs 55 on dry.
Pick tire A
You want the longest tread life
Cooper Discoverer AT3 XLT scores 73 vs 54 on treadwear.
Pick tire A
You drive through snowy winters
Cooper Discoverer AT3 XLT scores 71 vs 57 on snow.
Tire A · Cooper Discoverer AT3 XLT
Tire B · Cooper WeatherMaster SA2+
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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.