Tests – · none yet Owners 60 · 5 reviews
Kumho Solus Vier KH21 looks discontinued: no new owner reviews or road tests in five years and no current EU tyre label.
Head-to-head
Updated
Kumho Solus Vier KH21 vs Nexen CP671 — Compared
Relative Score (0–100): the weighted average of the categories below, each 60% road tests and 40% owner reviews. Based on 0 + 0 road tests and 5 + 62 owner reviews. How we score
CP671 leads, 67–65 Narrow edge
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Category by category
Relative Score per category, 0–100. Open “Why this score” for the tests and owner ratings behind it.
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66
Dry
CP671 +167Why this score
Source Solus Vier KH21 CP671 Professional tests (TWG score) ≈ 66 (est.) ≈ 67 (est.) Reviews found online 65 66 Solus Vier KH21: 60% × 66.5 (est.) + 40% × 64.6 = 66
CP671: 60% × 67.2 (est.) + 40% × 66.4 = 67
No road tests of dry for Solus Vier KH21. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.40).
No road tests of dry for CP671. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.40).
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71
Wet
Solus Vier KH21 +368Why this score
Source Solus Vier KH21 CP671 Professional tests (TWG score) ≈ 70 (est.) ≈ 68 (est.) Reviews found online 71 67 Solus Vier KH21: 60% × 70.4 (est.) + 40% × 70.9 = 71
CP671: 60% × 68.1 (est.) + 40% × 66.8 = 68
No road tests of wet for Solus Vier KH21. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.56).
No road tests of wet for CP671. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.56).
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–
Snow
No comparison60Why this score
Source Solus Vier KH21 CP671 Professional tests (TWG score) – ≈ 65 (est.) Reviews found online – 54 CP671: 60% × 64.6 (est.) + 40% × 53.8 = 60
No road tests of snow for CP671. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.33).
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62
Comfort
CP671 +567Why this score
Source Solus Vier KH21 CP671 Professional tests (TWG score) ≈ 67 (est.) ≈ 68 (est.) Reviews found online 54 65 Solus Vier KH21: 60% × 66.5 (est.) + 40% × 54.1 = 62
CP671: 60% × 68.3 (est.) + 40% × 64.5 = 67
No road tests of comfort for Solus Vier KH21 or CP671. The test half is the tested tires’ average (69): owners’ comfort ratings barely follow the road tests.
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–
Noise
No comparison66Why this score
Source Solus Vier KH21 CP671 Professional tests (TWG score) – ≈ 67 (est.) Reviews found online – 65 CP671: 60% × 67.3 (est.) + 40% × 64.5 = 66
No road tests of noise for CP671. The test half is the tested tires’ average (67): owners’ noise ratings barely follow the road tests.
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55
Treadwear
CP671 +964Why this score
Source Solus Vier KH21 CP671 Professional tests (TWG score) ≈ 60 (est.) ≈ 65 (est.) Reviews found online 47 63 Solus Vier KH21: 60% × 59.8 (est.) + 40% × 46.6 = 55
CP671: 60% × 64.7 (est.) + 40% × 62.5 = 64
No road tests of treadwear for Solus Vier KH21. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.31).
No road tests of treadwear for CP671. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.31).
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65
Handling (owners)
CP671 +267Why this score
Source Solus Vier KH21 CP671 Reviews found online 65 67
Scores at a glance
| Category | Kumho Solus Vier KH21 | Nexen CP671 |
|---|---|---|
| Relative Score | 65 | 67 |
| Dry | 66 | 67 |
| Wet | 71 | 68 |
| Snow | – | 60 |
| Comfort | 62 | 67 |
| Noise | – | 66 |
| Treadwear | 55 | 64 |
| Handling (owners) | 65 | 67 |
Higher is better. The Relative Score follows your weights below; category scores do not change.
Weight the categories that matter to you
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.
Important
NotLessNeutralImportantMost
Important
NotLessNeutralImportantMost
Neutral
NotLessNeutralImportantMost
Only one of the two tires has a score here, so this weight changes nothing in the head-to-head.
Less important
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost
Only one of the two tires has a score here, so this weight changes nothing in the head-to-head.
Neutral
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost
Recomputed
Headline score
65
/ 100
Solus Vier KH21
67
/ 100
CP671
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 Solus Vier KH21
Pros
- Cost-effective pricing compared to premium alternatives
- Certified for winter use with the mountain and snowflake symbol
- Reliable grip and handling characteristics when tires are new
Cons
- Rapid and uneven tread wear, particularly on front axles
- Increased road noise and reduced comfort as the rubber compound hardens over time
- Susceptibility to balancing issues and structural deformation
Tire B CP671
Pros
- Exceptional value and budget-friendly pricing
- Low road noise and smooth highway ride quality
- Impressive tread life and durability with regular rotations
Cons
- Subpar or limited performance in heavy snow and winter weather
- Occasional reports of increased road noise or minor roaring, especially at lower speeds
- Directional tread design can complicate tire rotation procedures
Specs side by side
| Attribute | A · Kumho Solus Vier KH21 | B · Nexen CP671 |
|---|---|---|
| Category | All Season | Summer Touring tires |
| Vehicle type | Passenger Car / Crossover | Passenger Car / Crossover |
| Sizes available | — | 12 |
| Rim diameters | — | 15″ – 19″ |
| Tread depth | — | 10/32″ |
| UTQG | — | 400 A A |
| Sidewall | — | Blackwall |
| Max pressure | — | 36 psi |
Which one should you actually buy?
65
/ 100
Kumho Solus Vier KH21
67
/ 100
Nexen CP671
Narrow edge: Nexen CP671 — better treadwear and comfort. Pick the Kumho Solus Vier KH21 if wet matters most to you. Kumho Solus Vier KH21 rests on little evidence so far (0 tests, 5 reviews), so read this result as provisional.
Pick tire B
You want the longest tread life
Nexen CP671 scores 64 vs 55 on treadwear.
Pick tire B
You want the most comfortable ride
Nexen CP671 scores 67 vs 62 on comfort.
Pick tire A
Your priority is wet-weather safety
Kumho Solus Vier KH21 scores 71 vs 68 on wet.
Tire A · Kumho Solus Vier KH21
Tire B · Nexen CP671
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Solus Vier KH21 or CP671?
Which is better in the wet, Solus Vier KH21 or CP671?
Kumho Solus Vier KH21, 71 vs 68 on our wet score.
Which grips better on dry roads, Solus Vier KH21 or CP671?
Neither, by our numbers: 66 vs 67 on the dry score, within 3 points.
Which is more comfortable, Solus Vier KH21 or CP671?
Nexen CP671, 67 vs 62 on our comfort score.
Which lasts longer, Solus Vier KH21 or CP671?
Nexen CP671, 64 vs 55 on our treadwear score.
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.
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