Relative Score (0–100): 60% professional tests, 40% owner reviews.
Discoverer AT3 XLT is ahead, 77–64
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Tests – · none yet Owners 80 · 800 reviews
“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.”
Tests – · none yet Owners 62 · 6 reviews
Relative Score per category, 0–100. Open “Why this score” for the tests and owner ratings behind it.
| Source | Discoverer AT3 XLT | Roadian CT8 |
|---|---|---|
| Reviews found online | 84 | 63 |
| Source | Discoverer AT3 XLT | Roadian CT8 |
|---|---|---|
| Reviews found online | 84 | 61 |
| Source | Discoverer AT3 XLT | Roadian CT8 |
|---|---|---|
| Reviews found online | 70 | – |
| Source | Discoverer AT3 XLT | Roadian CT8 |
|---|---|---|
| Reviews found online | 79 | 64 |
| Source | Discoverer AT3 XLT | Roadian CT8 |
|---|---|---|
| Reviews found online | 81 | – |
| Source | Discoverer AT3 XLT | Roadian CT8 |
|---|---|---|
| Reviews found online | 77 | 61 |
| Source | Discoverer AT3 XLT | Roadian CT8 |
|---|---|---|
| Reviews found online | 78 | 66 |
| Category | Cooper Discoverer AT3 XLT | Nexen Roadian CT8 |
|---|---|---|
| Relative Score | 77 | 64 |
| Dry | 78 | 64 |
| Wet | 80 | 63 |
| Snow | 70 | – |
| Comfort | 74 | 67 |
| Noise | 72 | – |
| Treadwear | 72 | 63 |
| Handling | 78 | 66 |
Higher is better. The Relative Score follows your weights below; category scores do not change.
Wet grip and treadwear start at “Important” — the two things buyers rank highest. Move the sliders and the scores update instantly.
Neither tire has a score here yet, so this weight changes nothing.
Neither tire has a score here yet, so this weight changes nothing.
Discoverer AT3 XLT
Roadian CT8
Only categories both tires have data for count toward the headline score.
Themes extracted from owner reviews found online — not the opinion of TireWheelGuide.
From Reddit, forums and review threads. Not part of our score
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.
“New shoes this week, Cooper Discoverer At3 XLT. I’m really impressed so far.”
“New Cooper Discoverer AT3 XLT 275/75R20 these ride way better than my old Open Country A/T II”
“Quote: Originally Posted by SodiumMonkey Thanks for the reply. I actually read through your entire build thread last night. Wow. Awesome stuff there. Im 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 dont want to trim anything and dont 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.”
Based on 13 community posts
We haven't collected enough community discussion about this tire yet.
| Attribute | A · Cooper Discoverer AT3 XLT | B · Nexen Roadian CT8 |
|---|---|---|
| Category | Premium Touring All Season tire | Summer |
| Vehicle type | SUV and 4x4 | Van |
| Sizes available | 4 | 29 |
| Rim diameters | 16″ – 20″ | 13″ – 17″ |
| Tread depth | 16 - 18/32″ | 10/32″ |
| Treadwear warranty | 60,000 mi | — |
| Sidewall | Black Side Wall - Raised White Lettering | Blackwall |
| Max pressure | 35 - 80 psi | 65 psi |
Cooper Discoverer AT3 XLT
Nexen Roadian CT8
Winner: Cooper Discoverer AT3 XLT — better wet, dry and handling. It leads or ties in every category we score.
Cooper Discoverer AT3 XLT scores 80 vs 63 on wet.
Cooper Discoverer AT3 XLT scores 78 vs 64 on dry.
Cooper Discoverer AT3 XLT scores 78 vs 66 on handling.
Cooper Discoverer AT3 XLT scores 72 vs 63 on treadwear.
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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.
