Tests – · none yet Owners 75 · 4 reviews
Head-to-head
Updated
Cooper Discoverer A/T3 Sport vs Kumho PorTran KC53 — Compared
Relative Score (0–100): 60% professional tests, 40% owner reviews.
Discoverer A/T3 Sport is ahead, 74–62
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Tests – · none yet Owners 59 · 285 reviews
Category by category
Relative Score per category, 0–100. Open “Why this score” for the tests and owner ratings behind it.
-
75
Dry
Discoverer A/T3 Sport +1164Why this score
Source Discoverer A/T3 Sport PorTran KC53 Reviews found online 79 63 -
76
Wet
Discoverer A/T3 Sport +1165Why this score
Source Discoverer A/T3 Sport PorTran KC53 Reviews found online 78 63 -
70
Snow
No comparison–Why this score
Source Discoverer A/T3 Sport PorTran KC53 Reviews found online 70 – -
74
Comfort
Discoverer A/T3 Sport +1361Why this score
Source Discoverer A/T3 Sport PorTran KC53 Reviews found online 78 53 -
68
Treadwear
Discoverer A/T3 Sport +1157Why this score
Source Discoverer A/T3 Sport PorTran KC53 Reviews found online 71 52 -
76
Handling
Discoverer A/T3 Sport +1462Why this score
Source Discoverer A/T3 Sport PorTran KC53 Reviews found online 76 62
Scores at a glance
| Category | Cooper Discoverer A/T3 Sport | Kumho PorTran KC53 |
|---|---|---|
| Relative Score | 74 | 62 |
| Dry | 75 | 64 |
| Wet | 76 | 65 |
| Snow | 70 | – |
| Comfort | 74 | 61 |
| Treadwear | 68 | 57 |
| Handling | 76 | 62 |
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
NoneLessNeutralMoreMost
Neutral
NoneLessNeutralMoreMost
Neither tire has a score here yet, so this weight changes nothing.
Less important
NoneLessNeutralMoreMost
Important
NoneLessNeutralMoreMost
Neutral
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Recomputed
Headline score
74
/ 100
Discoverer A/T3 Sport
62
/ 100
PorTran KC53
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 Discoverer A/T3 Sport
Pros
- Exceptional ride comfort on long trips and asphalt
- Very low fuel consumption compared to other tires
- Strong dry grip and above-average on-road performance
Cons
- Snow performance decreases significantly after the first year
- Slight oversteer tendencies on wet roundabouts
- Slipping tendencies in wet mud conditions
Tire B PorTran KC53
Pros
- Significantly quieter and more refined road noise compared to stock or competitor tires
- Smoother, more forgiving ride quality (frequently noted by motorhome owners)
- Excellent value for money and affordable pricing
Cons
- Occasional wheel spin or reduced forward traction when accelerating quickly in the wet
- Potential for accelerated edge wear under certain loads if pressures are not meticulously managed
- Isolated reports of premature sidewall cracking after a few years
Specs side by side
| Attribute | A · Cooper Discoverer A/T3 Sport | B · Kumho PorTran KC53 |
|---|---|---|
| Category | All Terrain and Off Road All Season tire | Summer Touring tires |
| Vehicle type | SUV and 4x4 | Van |
| Sizes available | — | 27 |
| Rim diameters | — | 14″ – 18″ |
Which one should you actually buy?
74
/ 100
Cooper Discoverer A/T3 Sport
62
/ 100
Kumho PorTran KC53
Winner: Cooper Discoverer A/T3 Sport — better handling, comfort and dry. It leads or ties in every category we score.
Pick tire A
You enjoy sharp, responsive handling
Cooper Discoverer A/T3 Sport scores 76 vs 62 on handling.
Pick tire A
You want the most comfortable ride
Cooper Discoverer A/T3 Sport scores 74 vs 61 on comfort.
Pick tire A
You want the most grip on dry roads
Cooper Discoverer A/T3 Sport scores 75 vs 64 on dry.
Pick tire A
Your priority is wet-weather safety
Cooper Discoverer A/T3 Sport scores 76 vs 65 on wet.
Tire A · Cooper Discoverer A/T3 Sport
Tire B · Kumho PorTran KC53
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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.