Toyo's Open Country A/T III is an all-terrain tire commonly fitted to crossovers, SUVs and light trucks. It is designed to perform well on pavement and off-road, and it stays sure-footed in wet weather.
Drivers also get solid durability and long tread life, which makes it a practical all-rounder for vehicles that split their time between highways and trails.
The 255/55R18 size is rated 109H for load and speed with extra load (XL) construction. It offers a 50 psi maximum inflation pressure, a UTQG rating of 600AA and an overall diameter of about 29 inches. This size carries a 65,000-mile treadwear warranty.
| Tire size | 255/55R18 |
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| Tire load index | 109 |
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| Tire speed rating | H |
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| Tire load range | XL |
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| Tire season | All-Season |
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| Tire terrain | All-Terrain |
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| Uniform tire quality grade (utqg) | 600 A A |
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| Tire treadwear rating | 600 |
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| Tire sidewall style | B |
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| Tread depth | 13.2 |
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| Overall diameter | 29 in |
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| Manufacturer | Toyo |
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| Tire width | 255 mm |
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| Vehicle fitment type | Universal |
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| Is run flat | N |
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| Vehicle type | Light Truck |
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| Construction type | Radial |
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| Electric vehicle tire | N |
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| Automotive parts division | Performance |
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| Wheel diameter | 18 in |
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| Flotation tire | N |
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| Maximum vehicle rim width | 9.00 in |
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| Features | Fits Multiple Makes And models |
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| Items included | Tire Only |
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| Minimum vehicle rim width | 7.00 in |
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| Count | 1 |
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| Vehicle class designator | P |
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| Tire location | Front and Rear Tires |
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| Tire diameter | 18 in |
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| Tire type | Passenger Car Tires |
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| Model | Open Country A/T III 355840 |
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| Maximum inflation pressure | 50 psi |
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| Tire aspect ratio | 55 |
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Specifications are as published by the manufacturer. Please confirm the size against the placard on your vehicle before ordering.
