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 + 2 road tests and 485 + 412 owner reviews. How we score
Too close to call: Ecsta PS91 57, NT555 G2 58.
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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 60 · 2 tests Owners 58 · 412 reviews
Best test result: #1 of 22 in 2022 Consumer Reports Ultra High Performance Summer Tires (tested tread life (miles))
Relative Score per category, 0–100. Open “Why this score” for the tests and owner ratings behind it.
| Source | Ecsta PS91 | NT555 G2 |
|---|---|---|
| Professional tests (TWG score) · 6 / 1 tests | 77 | 49 |
| Reviews found online | 51 | 64 |
Ecsta PS91: 60% × 76.7 + 40% × 50.9 = 66
NT555 G2: 60% × 49.1 + 40% × 63.8 = 55
| Source | Ecsta PS91 | NT555 G2 |
|---|---|---|
| Professional tests (TWG score) · 6 / 1 tests | 79 | 48 |
| Reviews found online | 52 | 54 |
Ecsta PS91: 60% × 78.7 + 40% × 51.5 = 68
NT555 G2: 60% × 48.3 + 40% × 54 = 51
| Source | Ecsta PS91 | NT555 G2 |
|---|---|---|
| Professional tests (TWG score) | ≈ 53 (est.) | ≈ 58 (est.) |
| Reviews found online | 15 | 33 |
Ecsta PS91: 60% × 52.9 (est.) + 40% × 15 = 38
NT555 G2: 60% × 58.5 (est.) + 40% × 32.7 = 48
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).
No road tests of snow for NT555 G2. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.32).
| Source | Ecsta PS91 | NT555 G2 |
|---|---|---|
| Professional tests (TWG score) | ≈ 64 (est.) | ≈ 68 (est.) |
| Reviews found online | 48 | 65 |
Ecsta PS91: 40% × 64.4 (est.) + 60% × 47.7 = 54
NT555 G2: 40% × 67.9 (est.) + 60% × 65 = 66
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 NT555 G2. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.20).
| Source | Ecsta PS91 | NT555 G2 |
|---|---|---|
| Professional tests (TWG score) · 3 / – tests | 70 | ≈ 66 (est.) |
| Reviews found online | 50 | 64 |
Ecsta PS91: 60% × 70.2 + 40% × 49.6 = 62
NT555 G2: 60% × 66.4 (est.) + 40% × 64.2 = 66
No road tests of noise for NT555 G2. The test half is the tested tires’ average (66): owners’ noise ratings barely follow the road tests.
| Source | Ecsta PS91 | NT555 G2 |
|---|---|---|
| Professional tests (TWG score) · – / 1 tests | ≈ 53 (est.) | 83 |
| Reviews found online | 30 | 66 |
Ecsta PS91: 60% × 53.4 (est.) + 40% × 30.2 = 44
NT555 G2: 60% × 83.3 + 40% × 66 = 76
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).
| Source | Ecsta PS91 | NT555 G2 |
|---|---|---|
| Reviews found online | 53 | 62 |
| Source | Ecsta PS91 | NT555 G2 |
|---|---|---|
| Professional tests (TWG score) · 3 / – tests | 47 | – |
| Category | Kumho Ecsta PS91 | Nitto NT555 G2 |
|---|---|---|
| Relative Score | 57 | 58 |
| Dry | 66 | 55 |
| Wet | 68 | 51 |
| Snow | 38 | 48 |
| Comfort | 54 | 66 |
| Noise | 62 | 66 |
| Treadwear | 44 | 76 |
| Handling (owners) | 53 | 62 |
| 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.
Ecsta PS91
NT555 G2
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 | NT555 G2 | Δ | Head-to-head |
|---|---|---|---|---|---|
| Dry Braking | Dry | 80% #5/10 · 2023 AUTO Straßenverkehr 2023 Summer Tire Test R18 | 89% #10/10 · 2025 Tire Rack UUHP Summer Tyre Test | – | Different tests |
| Dry Handling | Dry | 98% #7/10 · 2023 AZ UHP Summer Tyre Test | 94% #10/10 · 2025 Tire Rack UUHP Summer Tyre Test | – | Different tests |
| Dry Handling (tester's mark) | Dry | 70% #8/10 · 2023 AUTO Straßenverkehr 2023 Summer Tire Test R18 | 79% #10/10 · 2025 Tire Rack UUHP Summer Tyre Test | – | Different tests |
| Wet Braking | Wet | 70% #9/10 · 2023 AUTO Straßenverkehr 2023 Summer Tire Test R18 | 80% #10/10 · 2025 Tire Rack UUHP Summer Tyre Test | – | Different tests |
| Wet Circle | Wet | 70% #4/10 · 2023 AUTO Straßenverkehr 2023 Summer Tire Test R18 | 87% #10/10 · 2025 Tire Rack UUHP Summer Tyre Test | – | Different tests |
| Wet Handling | Wet | 97% #5/10 · 2023 AZ UHP Summer Tyre Test | 89% #10/10 · 2025 Tire Rack UUHP Summer Tyre Test | – | Different tests |
| Wet Handling (tester's mark) | Wet | 78% #6/10 · 2023 AUTO Straßenverkehr 2023 Summer Tire Test R18 | 76% #10/10 · 2025 Tire Rack UUHP Summer Tyre Test | – | Different tests |
| Also published by the testers (not in the score) | |||||
| Overall Ranking | Overall | #9/10 2023 AUTO Straßenverkehr 2023 Summer Tire Test R18 | #10/10 2025 Tire Rack UUHP Summer 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 · Nitto NT555 G2 |
|---|---|---|
| Category | Summer | Summer |
| Vehicle type | Passenger Car / Crossover | Passenger Car / Crossover |
| Sizes available | 1 | 88 |
| Rim diameters | 19″ | 15″ – 22″ |
| Tread depth | 9.5/32″ | 10.2/32″ |
| UTQG | 260 A A | 320 A A |
| Sidewall | Blackwall | Blackwall |
| Max pressure | 50 psi | 50 psi |
Kumho Ecsta PS91
Nitto NT555 G2
Too close to call: Kumho Ecsta PS91 and Nitto NT555 G2 are within 2 points overall. Kumho Ecsta PS91 is stronger on wet and dry. Nitto NT555 G2 is stronger on treadwear, comfort and snow.
Nitto NT555 G2 scores 76 vs 44 on treadwear.
Kumho Ecsta PS91 scores 68 vs 51 on wet.
Nitto NT555 G2 scores 66 vs 54 on comfort.
Kumho Ecsta PS91 scores 66 vs 55 on dry.
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Kumho Ecsta PS91, 68 vs 51 on our wet score.
Kumho Ecsta PS91, 66 vs 55 on our dry score.
Nitto NT555 G2, 48 vs 38 on our snow score.
Nitto NT555 G2, 66 vs 62 on our noise score.
Nitto NT555 G2, 66 vs 54 on our comfort score.
Nitto NT555 G2, 76 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
