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Toyo
Toyo TOY Open Country M/T LT285/70R17/10
Toyo TOY Open Country M/T LT285/70R17/10
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The Toyo Open Country M/T in 285/70R17 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 285/70R17 means
In the size 285/70R17, 285 is the section width in millimeters (11.22 in), 70 is the aspect ratio — the sidewall stands 70% as tall as the tire is wide, or 199.5 mm (7.85 in) — R denotes radial construction, and 17 is the wheel diameter in inches. That works out to an overall diameter of about 32.71 inches, turning roughly 617 revolutions per mile. Overall diameter is what matters for speedometer accuracy and clearance when you change sizes, so compare it — not just the width — against your current tire.
The manufacturer lists the overall diameter of this specific tire as 17 inches — when clearance is tight, go by the published figure rather than the nominal size math.
The service description on this tire decodes to a load index of 121 — a maximum load of 3,197 lbs per tire, or 118 (2,910 lbs) per tire when mounted as duals. The speed symbol P corresponds to a maximum sustained speed of 93 mph.
Load Range E corresponds to a 10-ply rating.
Specifications
| Size | LT285/70R17/10 |
| Tire Type | All Terrain |
| Service Description | 121/118P |
| Load Index | 121/118 |
| Speed Rating | P |
| Load Range | E (10 Ply) |
| Section Width (mm) | 285 |
| Aspect Ratio | 70 |
| Overall Diameter (in) | 17 |
| Tread Depth (/32") | 18.9 |
Frequently asked questions
What does 121/118P mean on the Toyo Open Country M/T?
121/118P breaks down as load index 121 — rated for 3,197 lbs per tire (118, or 2,910 lbs, in dual fitment) — with a P speed rating, good for a maximum sustained 93 mph.
What kind of tire is the Toyo Open Country M/T?
The Toyo Open Country M/T in 285/70R17 is a all terrain tire.
Will 285/70R17 tires fit my vehicle?
Check the size molded into your current tire's sidewall or the tire placard inside the driver's door jamb — if it reads 285/70R17, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right. See every 285/70R17 tire in stock to compare options.
Keep shopping
Shop all 285/70R17 tires, see every Toyo Open Country M/T size, explore all terrain tires, or view all tires at ThreePiece.us.
- BRAND:
- Toyo
- Model:
- TOY Open Country M/T
- Size:
- LT285/70R17/10
- Aspect Ratio:
- 70
- Load Index:
- 121/118
- Load Range:
- E (10 Ply)
- Section Width:
- 285
- Service Description:
- 121/118P
- Speed Index:
- P
- Temperature:
- N/A
- Tire Rim Diameter:
- 17
- Tire Type:
- All Terrain
- Traction:
- N/A
- Tread Wear:
- N/A
- Tread Depth:
- 18.9
- UQTG:
- N/A
- Warranty:
- N/A
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