Skip to content
tirewheelguide.com
Head-to-head Updated May 2026

Cooper Discoverer A/T3 Sport vs Kumho PorTran KC53 — Compared (May 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.

Tire A Cooper

Cooper Discoverer A/T3 Sport

All Terrain and Off Road All Season tire

Cooper Discoverer A/T3 Sport tread pattern
Objective (60%)
–/100
No test data yet
User signal (40%)
95/100
44 owner reviews
Dry
99
Wet
96
Snow
89
Comfort
97
Noise
94
Treadwear
94
Handling
87
Check price on Amazon

Prices change daily — check the retailer for your size.

VS
Tire B Kumho

Kumho PorTran KC53

Summer Touring tires

Kumho PorTran KC53 tread pattern
Objective (60%)
–/100
No test data yet
User signal (40%)
69/100
2 owner reviews
Dry
85
Wet
75
Snow
–
Comfort
60
Noise
–
Treadwear
70
Handling
80
Check price on Amazon

Prices change daily — check the retailer for your size.

VerdictWinner: Cooper Discoverer A/T3 Sport — better comfort, treadwear and wet. It leads or ties in every category we score.
Read full

TireWheelGuide may earn a commission from purchases made via links on this page.

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

Weight: Neutral
Score (0–100) Discoverer A/T3 Sport leads by 14
A
99
B
85
Why this score
SourceDiscoverer A/T3 SportPorTran KC53
Tyre Reviews owners 95 85

Wet

Weight: Important
Score (0–100) Discoverer A/T3 Sport leads by 21
A
96
B
75
Why this score
SourceDiscoverer A/T3 SportPorTran KC53
Tyre Reviews owners 85 75

Snow

Weight: Neutral
Score (0–100)
A
89
B
–
Why this score
SourceDiscoverer A/T3 SportPorTran KC53
Tyre Reviews owners 75 –

Comfort

Weight: Neutral
Score (0–100) Discoverer A/T3 Sport leads by 37
A
97
B
60
Why this score
SourceDiscoverer A/T3 SportPorTran KC53
Tyre Reviews owners 98 60

Noise

Weight: Neutral
Score (0–100)
A
94
B
–

Treadwear

Weight: Important
Score (0–100) Discoverer A/T3 Sport leads by 24
A
94
B
70
Why this score
SourceDiscoverer A/T3 SportPorTran KC53
Tyre Reviews owners 87 70

Handling

Weight: Neutral
Score (0–100) Discoverer A/T3 Sport leads by 7
A
87
B
80
Why this score
SourceDiscoverer A/T3 SportPorTran KC53
Tyre Reviews owners 87 80
DriverReviews owners – 78

Scores at a glance

CategoryCooper Discoverer A/T3 SportKumho PorTran KC53
Relative Score 95 74
Dry 99 85
Wet 96 75
Snow 89 –
Comfort 97 60
Noise 94 –
Treadwear 94 70
Handling 87 80

Higher is better. The Relative Score follows your weights below; category scores do not change.

Personalize

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.

Neutral
NoneLessNeutralMoreMost
Important
NoneLessNeutralMoreMost
Neutral
NoneLessNeutralMoreMost
Neutral
NoneLessNeutralMoreMost
Neutral
NoneLessNeutralMoreMost
Important
NoneLessNeutralMoreMost
Neutral
NoneLessNeutralMoreMost
Recomputed
Headline score

Tire A

Tire B

Only categories both tires have data for count toward the headline score.

From owners

Pros, cons & observations

Themes extracted from owner reviews across retailers and review sites — not the opinion of TireWheelGuide.

Tire A Cooper Discoverer A/T3 Sport

Not enough owner reviews yet to extract themes.

Tire B Kumho PorTran KC53

The Kumho PorTran KC53 receives mixed feedback, primarily serving as a budget-friendly option for caravans and heavy-duty trailers. While some users report impressive structural longevity and durability under load, others have experienced premature sidewall cracking and quality control inconsistencies.

Pros

  • High load-bearing capacity suitable for caravans and heavy trailers
  • Excellent structural integrity and tread retention over long periods
  • Cost-effective solution for low-mileage towing applications

Cons

  • Reports of premature sidewall cracking and degradation
  • Inconsistent quality control between individual units
  • Potential for accelerated aging of rubber compounds

Observations

  • Users specifically utilizing these for caravan applications appreciate the reinforced 8-ply construction and high load index.
  • Performance appears highly dependent on storage conditions, as some units show significant cracking within 2-3 years.
Specifications

Specs side by side

Attribute A · Cooper Discoverer A/T3 Sport B · Kumho PorTran KC53
CategoryAll Terrain and Off Road All Season tireSummer Touring tires
Vehicle typeSUV and 4x4Van
Final verdict

Which one should you actually buy?

Cooper

Kumho

Winner: Cooper Discoverer A/T3 Sport — better comfort, treadwear and wet. It leads or ties in every category we score.

Pick tire A You want the most comfortable ride

Cooper Discoverer A/T3 Sport scores 97 vs 60 on comfort.

Pick tire A You want the longest tread life

Cooper Discoverer A/T3 Sport scores 94 vs 70 on treadwear.

Pick tire A Your priority is wet-weather safety

Cooper Discoverer A/T3 Sport scores 96 vs 75 on wet.

Pick tire A You want the most grip on dry roads

Cooper Discoverer A/T3 Sport scores 99 vs 85 on dry.

Tire A · Cooper Discoverer A/T3 Sport
Check price on Amazon
Tire B · Kumho PorTran KC53
Check price on Amazon

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.