Tests 68 · 1 test Owners 67 · 5 reviews
Best test result: #1 of 10 in 2020 Teknikens 17 Inch Summer Tyre Test (straight aquaplaning)
Kumho Solus HS51 Harmony Sports looks discontinued: no new owner reviews or road tests in five years and no current EU tyre label.
Head-to-head
Updated
Kumho Solus HS51 Harmony Sports vs Michelin Primacy 3 — Compared
Relative Score (0–100): the weighted average of the categories below, each 60% road tests and 40% owner reviews. Based on 1 + 2 road tests and 5 + 195 owner reviews. How we score
Primacy 3 leads, 70–67 Narrow edge
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Tests 73 · 2 tests Owners 67 · 195 reviews
Best test result: #3 of 20 in 2017 Auto Bild Summer Tyre Test (wear)
“I have just put a new set of Michelin Primacy 3 T0 Acoustics on and they have been faultless. Lots of grip, very quiet etc. They were also good last year in the snow and were from blackcircles for about £240 a tyre.”
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
Primacy 3 +672Why this score
Source Solus HS51 Harmony Sports Primacy 3 Professional tests (TWG score) · 1 / 2 tests 65 74 Reviews found online 66 69 Solus HS51 Harmony Sports: 60% × 65.4 + 40% × 65.8 = 66
Primacy 3: 60% × 74.1 + 40% × 69.2 = 72
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73
Wet
Solus HS51 Harmony Sports +172Why this score
Source Solus HS51 Harmony Sports Primacy 3 Professional tests (TWG score) · 1 / 2 tests 75 72 Reviews found online 70 71 Solus HS51 Harmony Sports: 60% × 75.3 + 40% × 70.4 = 73
Primacy 3: 60% × 71.8 + 40% × 71.2 = 72
-
59
Comfort
Primacy 3 +968Why this score
Source Solus HS51 Harmony Sports Primacy 3 Professional tests (TWG score) · 1 / – tests 51 ≈ 69 (est.) Reviews found online 71 68 Solus HS51 Harmony Sports: 60% × 51 + 40% × 70.7 = 59
Primacy 3: 60% × 68.9 (est.) + 40% × 67.8 = 68
No road tests of comfort for Primacy 3. The test half is the tested tires’ average (69): owners’ comfort ratings barely follow the road tests.
-
66
Treadwear
Primacy 3 +167Why this score
Source Solus HS51 Harmony Sports Primacy 3 Professional tests (TWG score) · – / 1 tests ≈ 66 (est.) 72 Reviews found online 66 59 Solus HS51 Harmony Sports: 60% × 65.7 (est.) + 40% × 65.9 = 66
Primacy 3: 60% × 72.4 + 40% × 58.9 = 67
No road tests of treadwear for Solus HS51 Harmony Sports. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.31).
-
61
Handling (owners)
Primacy 3 +768Why this score
Source Solus HS51 Harmony Sports Primacy 3 Reviews found online 61 68
Scores at a glance
| Category | Kumho Solus HS51 Harmony Sports | Michelin Primacy 3 |
|---|---|---|
| Relative Score | 67 | 70 |
| Dry | 66 | 72 |
| Wet | 73 | 72 |
| Comfort | 59 | 68 |
| Treadwear | 66 | 67 |
| Handling (owners) | 61 | 68 |
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
Less important
NotLessNeutralImportantMost
Neutral
NotLessNeutralImportantMost
Less important
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Recomputed
Headline score
67
/ 100
Solus HS51 Harmony Sports
70
/ 100
Primacy 3
The professional test results behind the scores
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.
In the overall rankings of 2 tests that ran both, Kumho Solus HS51 Harmony Sports finished ahead 1 times and Michelin Primacy 3 1 times.
| Discipline | Category | Solus HS51 Harmony Sports | Primacy 3 | Δ | Head-to-head |
|---|---|---|---|---|---|
| Dry Braking | Dry | 91% #9/10 · 2020 Teknikens 17 Inch Summer Tyre Test | 100% #3/10 · 2017 Auto Bild Summer SUV Tyre Test | – | Different tests |
| Wet Braking | Wet | 95% #5/10 · 2020 Teknikens 17 Inch Summer Tyre Test | 95% #5/10 · 2017 Auto Bild Summer SUV Tyre Test | – | Different tests |
| Wet Handling | Wet | 99% #4/10 · 2020 Teknikens 17 Inch Summer Tyre Test | 97% #6/10 · 2017 Auto Bild Summer SUV Tyre Test | – | Different tests |
| Also published by the testers (not in the score) | |||||
| Overall Ranking | Overall | #17/19 | #1/19 | – | 1–1 in 2 shared tests Newest: 2015 European Tyre Test 205/55 R16 · 205/55 R16 |
Pros, cons & observations
Themes extracted from owner reviews found online — not the opinion of TireWheelGuide.
Tire A Solus HS51 Harmony Sports
Pros
- High level of ride comfort and low noise levels
- Excellent value for money compared to premium brands
- Strong wet weather performance
Cons
- Excessive sidewall softness leading to a 'wobbling' or unstable sensation
- Noticeable decline in grip levels before the tread is fully worn
- Inconsistent handling performance depending on axle placement
Tire B Primacy 3
Pros
- Exceptional ride comfort and low noise levels
- Strong dry grip and confident handling
- Smooth, refined high-speed stability and cruising capability
Cons
- Higher than average purchase price
- Faster-than-expected tread wear reported by many users
- Mixed feedback on wet weather performance, with some noting a lack of grip in standing water or snow
What real owners are saying
From Reddit, forums and review threads. Not part of our score
Tire A
Kumho Solus HS51 Harmony Sports
We haven't collected enough community discussion about this tire yet.
Tire B
Mixed
Michelin Primacy 3
Community members generally view the Michelin Primacy 3 as a quiet, smooth, and capable grand touring tire, with several users highlighting the run-flat (ZP) version as superior in comfort to competing run-flats. However, some drivers report fast tread wear, a harsh ride compared to standard non-run-flat alternatives, and note that the model is older and increasingly replaced by newer generations like the Primacy 4.
mbworld.org
“Currently riding on Michelin Primacy 3 ZP run flats that originally came with the car. Have approximately 15k miles on it and Mercedes are already recommending I purchase new rear tires. What other options would you recommend as replacements? I would like all season tires that last much longer but also don't want to compromise the comfort and ride. Front tire: 245/40 R19 Rear tire: 275/35 R19”
bimmerfest.com
·2014-08-25
“I have Pirellis on my 2014 F31 wagon. I have overinflated them slightly (3 psi front, 2 psi rear) because with the pressures placarded on the door post they are not responsive enough. With the overinflation they make fine street tires . At the limit they are still a bit soft, but the limits are so high that I have no business driving like that on the public highway. Tire Rack, I believe, tested Michelin Primacy 3 ZP (zero pressure, or run-flat all season tires ) and liked them. I have no thoughts about Continentals , so that I am only muddying your waters by adding in the Michelins for consideration.”
r/BMWi3
·7 upvotes ·2022-04-22
“So I have decided there is no way I am paying for the Bridgestone Ecopias at over £200 a tyre, and as such, I have come across the Michelin Primacy 3 on Costco, which I can get fitted for approx £93 a tyre (I only need two on the rear) They seem to have good reviews. My actual tyre size for my i3S should be 195/50 R20, but getting 195/55 R20 instead should only add up to another inch or so in height, so I'm reckoning I should be okay. What are people's thoughts?”
Top themes
#Run-flat ride quality#Tread wear and longevity#Touring comfort and low noise#Model obsolescence and replacements#OE fitment and regional availability#Price and size compatibility
Based on 23 community posts
Specs side by side
| Attribute | A · Kumho Solus HS51 Harmony Sports | B · Michelin Primacy 3 |
|---|---|---|
| Category | Summer | Summer |
| Vehicle type | Passenger Car / Crossover | Passenger Car / Crossover |
| Sizes available | — | 42 |
| Rim diameters | — | 15″ – 20″ |
Which one should you actually buy?
67
/ 100
Kumho Solus HS51 Harmony Sports
70
/ 100
Michelin Primacy 3
Narrow edge: Michelin Primacy 3 — better comfort, handling and dry. Where the Kumho Solus HS51 Harmony Sports is ahead, it is by less than 3 points. Kumho Solus HS51 Harmony Sports rests on little evidence so far (1 test, 5 reviews), so read this result as provisional.
Pick tire B
You want the most comfortable ride
Michelin Primacy 3 scores 68 vs 59 on comfort.
Pick tire B
You enjoy sharp, responsive handling
Michelin Primacy 3 scores 68 vs 61 on handling.
Pick tire B
You want the most grip on dry roads
Michelin Primacy 3 scores 72 vs 66 on dry.
Tire A · Kumho Solus HS51 Harmony Sports
Tire B · Michelin Primacy 3
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Solus HS51 Harmony Sports or Primacy 3?
Which is better in the wet, Solus HS51 Harmony Sports or Primacy 3?
Neither, by our numbers: 73 vs 72 on the wet score, within 3 points.
Which grips better on dry roads, Solus HS51 Harmony Sports or Primacy 3?
Michelin Primacy 3, 72 vs 66 on our dry score.
Which is more comfortable, Solus HS51 Harmony Sports or Primacy 3?
Michelin Primacy 3, 68 vs 59 on our comfort score.
Which lasts longer, Solus HS51 Harmony Sports or Primacy 3?
Neither, by our numbers: 66 vs 67 on the treadwear score, within 3 points.
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