Tests – · none yet Owners 46 · 14 reviews
Head-to-head
Updated
Kumho Solus KL21 vs Goodyear Eagle F1 GS-D2 — Compared
Relative Score (0–100): the weighted average of the categories below, each 60% road tests and 40% owner reviews (comfort 40/60). Based on 0 + 0 road tests and 14 + 9 owner reviews. How we score
Eagle F1 GS-D2 is ahead, 58–53
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Tests – · none yet Owners 53 · 9 reviews
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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52
Dry
Eagle F1 GS-D2 +759Why this score
Source Solus KL21 Eagle F1 GS-D2 Professional tests (TWG score) ≈ 58 (est.) ≈ 62 (est.) Reviews found online 44 54 Solus KL21: 60% × 57.9 (est.) + 40% × 43.7 = 52
Eagle F1 GS-D2: 60% × 62.1 (est.) + 40% × 53.9 = 59
No road tests of dry for Solus KL21. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.41).
No road tests of dry for Eagle F1 GS-D2. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.41).
-
56
Wet
Eagle F1 GS-D2 +662Why this score
Source Solus KL21 Eagle F1 GS-D2 Professional tests (TWG score) ≈ 60 (est.) ≈ 64 (est.) Reviews found online 51 58 Solus KL21: 60% × 59.9 (est.) + 40% × 51 = 56
Eagle F1 GS-D2: 60% × 63.9 (est.) + 40% × 58.3 = 62
No road tests of wet for Solus KL21. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).
No road tests of wet for Eagle F1 GS-D2. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.55).
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52
Snow
No comparison–Why this score
Source Solus KL21 Eagle F1 GS-D2 Professional tests (TWG score) ≈ 61 (est.) – Reviews found online 39 – Solus KL21: 60% × 60.5 (est.) + 40% × 39.1 = 52
No road tests of snow for Solus KL21. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.32).
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51
Comfort
Eagle F1 GS-D2 +354Why this score
Source Solus KL21 Eagle F1 GS-D2 Professional tests (TWG score) ≈ 63 (est.) ≈ 64 (est.) Reviews found online 43 47 Solus KL21: 40% × 63.5 (est.) + 60% × 42.8 = 51
Eagle F1 GS-D2: 40% × 64.3 (est.) + 60% × 47 = 54
No road tests of comfort for Solus KL21. 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 Eagle F1 GS-D2. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.20).
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56
Treadwear
Level56Why this score
Source Solus KL21 Eagle F1 GS-D2 Professional tests (TWG score) ≈ 61 (est.) ≈ 60 (est.) Reviews found online 50 49 Solus KL21: 60% × 60.6 (est.) + 40% × 49.9 = 56
Eagle F1 GS-D2: 60% × 60.3 (est.) + 40% × 49 = 56
No road tests of treadwear for Solus KL21. 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 Eagle F1 GS-D2. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.36).
-
43
Handling (owners)
Eagle F1 GS-D2 +851Why this score
Source Solus KL21 Eagle F1 GS-D2 Reviews found online 43 51
Scores at a glance
| Category | Kumho Solus KL21 | Goodyear Eagle F1 GS-D2 |
|---|---|---|
| Relative Score | 53 | 58 |
| Dry | 52 | 59 |
| Wet | 56 | 62 |
| Snow | 52 | – |
| Comfort | 51 | 54 |
| Treadwear | 56 | 56 |
| Handling (owners) | 43 | 51 |
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
Neutral
NotLessNeutralImportantMost
Less important
NotLessNeutralImportantMost
Recomputed
Headline score
53
/ 100
Solus KL21
58
/ 100
Eagle F1 GS-D2
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 KL21
Pros
- Impressive treadwear and longevity reported by many users, with several achieving over 30,000 to 40,000 miles
- Good ride comfort and low road noise under normal driving conditions
- Affordable replacement pricing compared to premium tier brands
Cons
- Extremely poor grip and significantly increased braking distances on fresh or compact snow and ice
- Isolated reports of extreme premature wear or complete tread failure under 20,000 miles
- Structural deformation issues reported by at least one user
Tire B Eagle F1 GS-D2
Pros
- Predictable and progressive grip loss characteristics
- Good initial wet weather traction and performance
- Suitable OEM fitment matching for light hatchbacks like the Suzuki Swift Sport
Cons
- High noise levels, particularly when cornering
- Compounds harden prematurely, leading to a severe loss of grip after extended mileage
- Poor rim protection design leading to vulnerable wheel edges
Specs side by side
| Attribute | A · Kumho Solus KL21 | B · Goodyear Eagle F1 GS-D2 |
|---|---|---|
| Category | All Season | Summer |
| Vehicle type | Passenger Car / Crossover | Passenger Car / Crossover |
| Sizes available | 5 | — |
| Rim diameters | 17″ – 20″ | — |
Which one should you actually buy?
53
/ 100
Kumho Solus KL21
58
/ 100
Goodyear Eagle F1 GS-D2
Winner: Goodyear Eagle F1 GS-D2 — better handling, dry and wet. It leads or ties in every category we score. Kumho Solus KL21 rests on little evidence so far (0 tests, 14 reviews), so read this result as provisional. Goodyear Eagle F1 GS-D2 rests on little evidence so far (0 tests, 9 reviews), so read this result as provisional.
Pick tire B
You enjoy sharp, responsive handling
Goodyear Eagle F1 GS-D2 scores 51 vs 43 on handling.
Pick tire B
You want the most grip on dry roads
Goodyear Eagle F1 GS-D2 scores 59 vs 52 on dry.
Pick tire B
Your priority is wet-weather safety
Goodyear Eagle F1 GS-D2 scores 62 vs 56 on wet.
Pick tire B
You want the most comfortable ride
Goodyear Eagle F1 GS-D2 scores 54 vs 51 on comfort.
Tire A · Kumho Solus KL21
Tire B · Goodyear Eagle F1 GS-D2
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Solus KL21 or Eagle F1 GS-D2?
Which is better in the wet, Solus KL21 or Eagle F1 GS-D2?
Goodyear Eagle F1 GS-D2, 62 vs 56 on our wet score.
Which grips better on dry roads, Solus KL21 or Eagle F1 GS-D2?
Goodyear Eagle F1 GS-D2, 59 vs 52 on our dry score.
Which is more comfortable, Solus KL21 or Eagle F1 GS-D2?
Goodyear Eagle F1 GS-D2, 54 vs 51 on our comfort score.
Which lasts longer, Solus KL21 or Eagle F1 GS-D2?
Neither, by our numbers: 56 vs 56 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