Tests – · 1 test Owners 64 · 24 reviews
Head-to-head
Updated
Firestone WeatherGrip vs Dunlop SP31 A/S — Compared
Relative Score (0–100): 60% professional tests, 40% owner reviews.
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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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65
Dry
No comparison–Why this score
Source WeatherGrip SP31 A/S Reviews found online 63 – -
68
Wet
No comparison–Why this score
Source WeatherGrip SP31 A/S Reviews found online 68 – -
74
Snow
No comparison–Why this score
Source WeatherGrip SP31 A/S Reviews found online 76 – -
66
Comfort
No comparison–Why this score
Source WeatherGrip SP31 A/S Reviews found online 63 – -
67
Noise
No comparison–Why this score
Source WeatherGrip SP31 A/S Reviews found online 67 – -
54
Treadwear
No comparison–Why this score
Source WeatherGrip SP31 A/S Professional tests (TWG score) 54 – Reviews found online 55 – -
62
Handling
No comparison–Why this score
Source WeatherGrip SP31 A/S Reviews found online 62 –
Scores at a glance
| Category | Firestone WeatherGrip | Dunlop SP31 A/S |
|---|---|---|
| Relative Score | 64 | – |
| Dry | 65 | – |
| Wet | 68 | – |
| Snow | 74 | – |
| Comfort | 66 | – |
| Noise | 67 | – |
| Treadwear | 54 | – |
| Handling | 62 | – |
Higher is better. The Relative Score follows your weights below; category scores do not change.
Weight the categories that matter to you
Wet grip and treadwear start at “Important” — the two things buyers rank highest. Move the sliders and the scores update instantly.
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Neutral
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Less important
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Important
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Neutral
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Recomputed
Headline score
64
/ 100
WeatherGrip
–
/ 100
SP31 A/S
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 WeatherGrip
Pros
- Outstanding snow and winter weather traction
- Confident wet weather and rain grip
- Smooth and comfortable ride quality
Cons
- Faster tread wear due to the softer rubber compound
- Noticeable drop in fuel economy (MPG)
- Subpar dry pavement performance compared to dedicated summer or standard all-season tires
Tire B SP31 A/S
Not enough owner reviews yet to extract themes.
Specs side by side
| Attribute | A · Firestone WeatherGrip | B · Dunlop SP31 A/S |
|---|---|---|
| Category | All Weather | — |
| Vehicle type | Passenger Car / Crossover | — |
| Sizes available | 49 | — |
| Rim diameters | 15″ – 19″ | — |
| Tread depth | 10/32″ | — |
| UTQG | 640 A A | — |
| Treadwear warranty | 65,000 mi | — |
| Sidewall | Blackwall | — |
| Max pressure | 44 psi | — |
Which one should you actually buy?
64
/ 100
Firestone WeatherGrip
–
/ 100
Dunlop SP31 A/S
Only Firestone WeatherGrip has enough test and review data for a Relative Score, so there is no head-to-head winner yet.
Tire A · Firestone WeatherGrip
Tire B · Dunlop SP31 A/S
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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.
Community buzz from Reddit and forums is shown for context only — it never changes the score.