Tests – · 1 test Owners 57 · 42 reviews
Best test result: #6 of 22 in 2022 Consumer Reports Ultra High Performance Summer Tires (tested tread life (miles))
Head-to-head
Updated
Sumitomo HTR Z III vs Toyo Proxes ST — Compared
Relative Score (0–100): the weighted average of the categories below, each 60% road tests and 40% owner reviews. Based on 1 + 0 road tests and 42 + 14 owner reviews. How we score
Proxes ST is ahead, 71–61
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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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68
Dry
Proxes ST +472Why this score
Source HTR Z III Proxes ST Professional tests (TWG score) ≈ 68 (est.) ≈ 71 (est.) Reviews found online 68 75 HTR Z III: 60% × 68 (est.) + 40% × 68.3 = 68
Proxes ST: 60% × 70.5 (est.) + 40% × 74.7 = 72
No road tests of dry for HTR Z III. 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 Proxes ST. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.40).
-
64
Wet
Proxes ST +1175Why this score
Source HTR Z III Proxes ST Professional tests (TWG score) ≈ 65 (est.) ≈ 74 (est.) Reviews found online 62 77 HTR Z III: 60% × 65.5 (est.) + 40% × 62.1 = 64
Proxes ST: 60% × 73.6 (est.) + 40% × 76.6 = 75
No road tests of wet for HTR Z III. 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 Proxes ST. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.56).
-
35
Snow
Proxes ST +3166Why this score
Source HTR Z III Proxes ST Professional tests (TWG score) ≈ 51 (est.) ≈ 68 (est.) Reviews found online 12 64 HTR Z III: 60% × 50.8 (est.) + 40% × 12.2 = 35
Proxes ST: 60% × 67.8 (est.) + 40% × 63.6 = 66
No road tests of snow for HTR Z III. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.33).
No road tests of snow for Proxes ST. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.33).
-
67
Comfort
Proxes ST +572Why this score
Source HTR Z III Proxes ST Professional tests (TWG score) ≈ 68 (est.) ≈ 70 (est.) Reviews found online 65 74 HTR Z III: 60% × 68.5 (est.) + 40% × 65.4 = 67
Proxes ST: 60% × 70 (est.) + 40% × 74.1 = 72
No road tests of comfort for HTR Z III or Proxes ST. The test half is the tested tires’ average (69): owners’ comfort ratings barely follow the road tests.
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66
Noise
No comparison–Why this score
Source HTR Z III Proxes ST Professional tests (TWG score) ≈ 67 (est.) – Reviews found online 65 – HTR Z III: 60% × 67.3 (est.) + 40% × 64.6 = 66
No road tests of noise for HTR Z III. The test half is the tested tires’ average (67): owners’ noise ratings barely follow the road tests.
-
66
Treadwear
Proxes ST +369Why this score
Source HTR Z III Proxes ST Professional tests (TWG score) · 1 / – tests 70 ≈ 67 (est.) Reviews found online 60 72 HTR Z III: 60% × 70.2 + 40% × 59.9 = 66
Proxes ST: 60% × 67.5 (est.) + 40% × 71.7 = 69
No road tests of treadwear for Proxes ST. The test half is estimated from the owner ratings, as far as owners and testers agree (correlation 0.31).
-
67
Handling (owners)
Proxes ST +471Why this score
Source HTR Z III Proxes ST Reviews found online 67 71
Scores at a glance
| Category | Sumitomo HTR Z III | Toyo Proxes ST |
|---|---|---|
| Relative Score | 61 | 71 |
| Dry | 68 | 72 |
| Wet | 64 | 75 |
| Snow | 35 | 66 |
| Comfort | 67 | 72 |
| Noise | 66 | – |
| Treadwear | 66 | 69 |
| Handling (owners) | 67 | 71 |
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
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
61
/ 100
HTR Z III
71
/ 100
Proxes ST
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 HTR Z III
Pros
- Excellent price-to-performance ratio
- Strong dry handling and steering feedback
- Quiet and comfortable ride quality
Cons
- Inconsistent wet-weather side grip during cornering
- Limited traction under heavy acceleration on high-horsepower vehicles
- Not suitable for winter or freezing conditions
Tire B Proxes ST
Pros
- Exceptional tread life and long-term durability
- Quiet and comfortable ride quality compared to other brands and run-flats
- Strong dry and wet grip with good resistance to aquaplaning
Cons
- Poor performance and limited traction in snow and ice
- A small number of users experienced disappointing treadwear and longevity
- Conflicting feedback regarding wet grip, with isolated reports of poor performance
Specs side by side
| Attribute | A · Sumitomo HTR Z III | B · Toyo Proxes ST |
|---|---|---|
| Category | Summer | All Season |
| Vehicle type | Passenger Car / Crossover | SUV and 4x4 |
| Tread depth | 10/32″ | — |
| UTQG | 300 A A | — |
| Sidewall | Blackwall | — |
| Max pressure | 50 psi | — |
Which one should you actually buy?
61
/ 100
Sumitomo HTR Z III
71
/ 100
Toyo Proxes ST
Winner: Toyo Proxes ST — better snow, wet and comfort. It leads or ties in every category we score. Toyo Proxes ST rests on little evidence so far (0 tests, 14 reviews), so read this result as provisional.
Pick tire B
You drive through snowy winters
Toyo Proxes ST scores 66 vs 35 on snow.
Pick tire B
Your priority is wet-weather safety
Toyo Proxes ST scores 75 vs 64 on wet.
Pick tire B
You want the most comfortable ride
Toyo Proxes ST scores 72 vs 67 on comfort.
Pick tire B
You want the most grip on dry roads
Toyo Proxes ST scores 72 vs 68 on dry.
Tire A · Sumitomo HTR Z III
Tire B · Toyo Proxes ST
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HTR Z III or Proxes ST?
Which is better in the wet, HTR Z III or Proxes ST?
Toyo Proxes ST, 75 vs 64 on our wet score.
Which grips better on dry roads, HTR Z III or Proxes ST?
Toyo Proxes ST, 72 vs 68 on our dry score.
Which is better in snow, HTR Z III or Proxes ST?
Toyo Proxes ST, 66 vs 35 on our snow score.
Which is more comfortable, HTR Z III or Proxes ST?
Toyo Proxes ST, 72 vs 67 on our comfort score.
Which lasts longer, HTR Z III or Proxes ST?
Toyo Proxes ST, 69 vs 66 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