Relative Score (0–100): the weighted average of the categories below, each 60% road tests and 40% owner reviews (comfort 40/60). Based on 6 + 0 road tests and 485 + 165 owner reviews. How we score
Ecsta KU31 is ahead, 67–60
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Tests 77 · 6 tests Owners 42 · 485 reviews
Best test result: #1 of 11 in 2023 AUTO Straßenverkehr 2023 Summer Tire Test R18 (exterior noise)
“Putting some Kumho Ecsta PS91s on. Curious how they’ll do since my go to Falken rt660 doesn’t come in the oem 18” sizes”
Tests – · none yet Owners 66 · 165 reviews
Relative Score per category, 0–100. Open “Why this score” for the tests and owner ratings behind it.
| Source | Ecsta PS91 | Ecsta KU31 |
|---|---|---|
| Professional tests (TWG score) · 6 / – tests | 77 | ≈ 68 (est.) |
| Reviews found online | 51 | 67 |
Ecsta PS91: 60% × 76.7 + 40% × 50.9 = 66
Ecsta KU31: 60% × 67.6 (est.) + 40% × 67.1 = 67
No road tests of dry for Ecsta KU31. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.41).
| Source | Ecsta PS91 | Ecsta KU31 |
|---|---|---|
| Professional tests (TWG score) · 6 / – tests | 79 | ≈ 70 (est.) |
| Reviews found online | 52 | 69 |
Ecsta PS91: 60% × 78.7 + 40% × 51.5 = 68
Ecsta KU31: 60% × 69.9 (est.) + 40% × 69.2 = 70
No road tests of wet for Ecsta KU31. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).
| Source | Ecsta PS91 | Ecsta KU31 |
|---|---|---|
| Professional tests (TWG score) | ≈ 53 (est.) | – |
| Reviews found online | 15 | – |
Ecsta PS91: 60% × 52.9 (est.) + 40% × 15 = 38
No road tests of snow for Ecsta PS91. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.32).
| Source | Ecsta PS91 | Ecsta KU31 |
|---|---|---|
| Professional tests (TWG score) | ≈ 64 (est.) | ≈ 68 (est.) |
| Reviews found online | 48 | 63 |
Ecsta PS91: 40% × 64.4 (est.) + 60% × 47.7 = 54
Ecsta KU31: 40% × 67.5 (est.) + 60% × 63 = 65
No road tests of comfort for Ecsta PS91. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.20).
No road tests of comfort for Ecsta KU31. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.20).
| Source | Ecsta PS91 | Ecsta KU31 |
|---|---|---|
| Professional tests (TWG score) · 3 / – tests | 70 | – |
| Reviews found online | 50 | – |
Ecsta PS91: 60% × 70.2 + 40% × 49.6 = 62
| Source | Ecsta PS91 | Ecsta KU31 |
|---|---|---|
| Professional tests (TWG score) | ≈ 53 (est.) | ≈ 64 (est.) |
| Reviews found online | 30 | 61 |
Ecsta PS91: 60% × 53.4 (est.) + 40% × 30.2 = 44
Ecsta KU31: 60% × 64.3 (est.) + 40% × 60.5 = 63
No road tests of treadwear for Ecsta PS91. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.36).
No road tests of treadwear for Ecsta KU31. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.36).
| Source | Ecsta PS91 | Ecsta KU31 |
|---|---|---|
| Reviews found online | 53 | 67 |
| Source | Ecsta PS91 | Ecsta KU31 |
|---|---|---|
| Professional tests (TWG score) · 3 / – tests | 47 | – |
| Category | Kumho Ecsta PS91 | Kumho Ecsta KU31 |
|---|---|---|
| Relative Score | 60 | 67 |
| Dry | 66 | 67 |
| Wet | 68 | 70 |
| Snow | 38 | – |
| Comfort | 54 | 65 |
| Noise | 62 | – |
| Treadwear | 44 | 63 |
| Handling (owners) | 53 | 67 |
| Efficiency | 47 | – |
Higher is better. The Relative Score follows your weights below; category scores do not change.
Wet grip starts at “Important”. Treadwear starts at “Neutral” here: road tests measured it for at most one of the two tires, so it rests on owner reviews. Move the sliders and the scores update instantly.
Only one of the two tires has a score here, so this weight changes nothing in the head-to-head.
Only one of the two tires has a score here, so this weight changes nothing in the head-to-head.
Only one of the two tires has a score here, so this weight changes nothing in the head-to-head.
Ecsta PS91
Ecsta KU31
Only categories both tires have data for count toward the headline score.
Per discipline: the average % of the best tire over every test both tires were in, and how many of those tests each one won. “Different tests” rows compare results from separate tests.
| Discipline | Category | Ecsta PS91 | Ecsta KU31 | Δ | Head-to-head |
|---|---|---|---|---|---|
| Also published by the testers (not in the score) | |||||
| Overall Ranking | Overall | #9/10 2023 AUTO Straßenverkehr 2023 Summer Tire Test R18 | #7/7 2014 Auto Review Max Performance Tyre Test | – | Different tests |
Themes extracted from owner reviews found online — not the opinion of TireWheelGuide.
From Reddit, forums and review threads. Not part of our score
The community views the Kumho Ecsta PS91 as an attractive, budget-friendly max performance summer tire that offers decent street traction, low noise, and a tread pattern resembling higher-end options like Michelin. However, opinions are split; while some drivers praise them as a great value alternative for daily driving and light spirited use, enthusiasts note limitations regarding rapid wear, subpar track endurance, and inferior grip compared to top-tier performance tires.
“Putting some Kumho Ecsta PS91s on. Curious how they’ll do since my go to Falken rt660 doesn’t come in the oem 18” sizes”
“New meaty tires set up installed, now I can order spacers Went up tire sizes and they definitely fill the gap a bit. First time running sticky kumhos on anytime so excited to see how they turn out.Specs are Kumho Ecsta Ps91 235/40/18 up front and 265/40/18 in the rear. Read more”
“You will get smoked if you go with the PS91. They also do not hold well under abuse. I feel that the RE-71RS would be a better value for you simply because they'll hold and remain consistent even as they wear very far down. I've used the RE-71RS at a track day before and even as the tires were chunking and melting, they still maintained their grip, as if they were just BEGGING to be abused, to see how far they could be pushed.”
Based on 46 community posts
We haven't collected enough community discussion about this tire yet.
| Attribute | A · Kumho Ecsta PS91 | B · Kumho Ecsta KU31 |
|---|---|---|
| Category | Summer | Summer |
| Vehicle type | Passenger Car / Crossover | Passenger Car / Crossover |
| Tread depth | 9.5/32″ | — |
| UTQG | 260 A A | — |
| Sidewall | Blackwall | — |
| Max pressure | 50 psi | — |
Kumho Ecsta PS91
Kumho Ecsta KU31
Winner: Kumho Ecsta KU31 — better treadwear, handling and comfort. It leads or ties in every category we score.
Kumho Ecsta KU31 scores 63 vs 44 on treadwear.
Kumho Ecsta KU31 scores 67 vs 53 on handling.
Kumho Ecsta KU31 scores 65 vs 54 on comfort.
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Neither, by our numbers: 68 vs 70 on the wet score, within 3 points.
Neither, by our numbers: 66 vs 67 on the dry score, within 3 points.
Kumho Ecsta KU31, 65 vs 54 on our comfort score.
Kumho Ecsta KU31, 63 vs 44 on our treadwear score.
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.
Handling is the exception: road tests measure it inside the dry and wet scores, so its own row comes from owner ratings only and starts as less important.
Community buzz from Reddit and forums is shown for context only — it never changes the score. Full methodology
