Toyo Proxes ST III

Good spec profile
Estimated from manufacturer specs (UTQG, warranty, speed rating)
Scouter Analysis
The Toyo Proxes ST III is a solid choice for drivers who prioritize treadlife in the ultra-high performance summer category, thanks to its high treadlife score and 40,000-mile warranty. While its dry grip and handling scores are competitive, they don't quite match the top performers in the segment, like the Michelin Pilot Sport 4S. In terms of category priorities, dry grip and handling are crucial, and the Proxes ST III delivers adequately with scores of 8 in both. However, its wet grip rating of 7 is below the category average, which could be a concern for those frequently driving in wet conditions. The comfort and noise scores are average, making it a reasonable choice for daily driving without excessive road noise. When compared to competitors like the Pirelli P Zero (PZ4) and Michelin Pilot Sport 4S, the Proxes ST III stands out more for its longevity than outright performance. The Michelin offers better grip and handling, while the Pirelli is known for its balanced performance across dry and wet conditions. If maximum grip is your priority, the Michelin might be worth the extra cost. Drivers seeking a high-speed tire should look elsewhere due to the 'R' speed rating, which limits top-speed capability compared to the usual 'Y' or 'Z' ratings in this segment. Consider the Proxes ST III if you want a performance tire that lasts longer and don't mind compromising slightly on wet grip and top speed.
Spec-based analysis — see our methodology.
Performance Profile
Estimated from manufacturer specs — not measured test data.
Technical Specifications
Where to Buy
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Available Sizes & Specs
| Size | Load Index | Speed Rating | UTQG | Max Load (lbs) | Max PSI | Weight (lbs) |
|---|---|---|---|---|---|---|
| 225/55R18 | 102 | R | 500 A A | 1,874 | 50 | 30 |
| 225/65R17 | 106 | R | 500 A A | 2,094 | 50 | 29 |
| 235/55R19 | 105 | R | 500 A A | 2,039 | 50 | 32 |
| 235/55R20 | 105 | R | 500 A A | 2,039 | 50 | 33 |
| 235/60R18 | 107 | R | 500 A A | 2,149 | 50 | 32 |
| 235/65R17 | 108 | R | 500 A A | 2,205 | 50 | 31 |
| 235/65R18 | 110 | R | 500 A A | 2,337 | 50 | 34 |
| 245/50R20 | 102 | R | 500 A A | 1,874 | 51 | 32 |
| 245/60R18 | 105 | R | 500 A A | 2,039 | 51 | 33 |
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