Open Country A/T III EV
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Specifications
| Size | 275/70R18 Open Country A/T Iii EV |
|---|---|
| Width | 275 mm |
| Aspect ratio | 70 |
| Rim diameter | R18 |
| Load index | 116 |
| Speed rating | T |
| Load range | SL |
| Season | All-Weather |
|---|---|
| UTQG | 600 A B |
| Treadwear warranty | 65,000 miles |
| Tread depth | 13.5/32" |
| Weight | 45 lbs |
| Max pressure | 44 psi |
| Severe snow (3PMSF) | Yes |
| Run-flat | No |
About the Toyo Open Country A/T III EV
All-Weather All-Terrain Passenger Light Truck/SUV tire Specifically Designed for Electric Vehicles.
Features
* Aerodynamic sidewall* Staggered shoulder lugs* More evenly distributed void area* Stone ejecting blocks* Increased lateral grooves* 3D multi-wave sipes* 50,000 Mile Limited Treadwear Warranty (LT and Flotation Sizes)* 65,000 Mile Limited Treadwear Warranty (P/Euro-Metric Sizes)* M+S Rated* Carries the Three-Peak Mountain Snowflake (3PMSF) symbol
Benefits
* Provides rugged all-terrain performance and appearance* Enhance off-road traction with biting edges* Increases tread block rigidity for excellent handling and stability* Provides better worn appearance* Eject stone from grooves* Enhance traction on all surfaces, including snow* Help reduce irregular wear* Meets the required performance criteria for Use in Severe Snow Conditions
Understanding the 275/70R18 size
In the size code 275/70R18, 275 is the section width in millimetres (about 10.8"). 70 is the aspect ratio — the sidewall height is 70% of the width, or roughly 192.5 mm. R18 means radial construction on a 18-inch wheel, giving an approximate overall diameter of 33.2".
The load index 116 means each tire supports up to 2,756 lbs — about 11,024 lbs across a full set of four. The speed symbol T certifies the tire to 118 mph under its rated load. Always match or exceed the load index and speed rating listed on your vehicle's door-jamb placard.
What the Toyo Open Country A/T III EV is built for
The Toyo Open Country A/T III EV is an all-weather tire — a year-round option certified for severe snow service, so it can stay on the vehicle through winter. It carries the three-peak mountain snowflake (3PMSF) symbol, meaning it passed a standardised severe-snow traction test. It is classified for all-terrain (a/t) use.
Tread life and grip ratings
This tire carries a UTQG rating of 600 A B. The treadwear grade of 600 is a relative durability score — a grade of 200 is expected to last roughly twice as long as a grade of 100 under the same controlled test. Traction grade A measures straight-line wet stopping grip (AA is highest, then A, B and C). Temperature grade B reflects heat resistance at sustained speed (A is highest).
Price and value
At $271.48 per tire, a full set of four costs $1085.92. That is about 12% above the average of the 105 tires we stock in this size, reflecting its position in the range. Backed by a 65,000-mile treadwear warranty, that works out to roughly $16.71 per 1,000 miles across the set.
Frequently asked questions
What does the tire size 275/70R18 mean?
275 is the section width in millimetres, 70 is the aspect ratio (sidewall height as a percentage of width, about 192.5 mm), and R18 indicates radial construction for a 18-inch wheel. Overall diameter is approximately 33.2 inches.
What are the load and speed ratings of the Toyo Open Country A/T III EV 275/70R18?
Its load index of 116 allows up to 2,756 lbs per tire. Its speed rating of T is certified to 118 mph. Check your door-jamb placard and do not fit a tire rated below the vehicle's requirement.
How much does a set of 4 Toyo Open Country A/T III EV 275/70R18 tires cost?
A single tire is $271.48 and a set of four is $1085.92, covered by a 65,000-mile treadwear warranty.
Is the Toyo Open Country A/T III EV rated for snow?
Yes. It carries the three-peak mountain snowflake (3PMSF) symbol, meaning it met a standardised severe snow traction test.
Does the Open Country A/T III EV come in other sizes?
Yes — we stock 15 additional Open Country A/T III EV sizes besides 275/70R18. Fit only a size approved for your vehicle.