Write a Review
Toyo
Toyo TOY Open Country M/T LT305/55R20/12
Toyo TOY Open Country M/T LT305/55R20/12
📧 Get Fitment Help
Verify parts fit & get product recommendations
Lease-to-own for as low as
/week
Get Started
Guaranteed to Fit — confirm your size with the fitment checker on this page
Price Match Guarantee Learn More
Free Mount & Balance
Free Shipping
IN STOCK (20 wheels)
📧 Get Fitment Help
Verify parts fit & get product recommendations
Looking for a 305/55R20 all terrain tire? The Toyo Open Country M/T is available now at ThreePiece.us with free shipping on every order and Affirm financing at checkout.
What 305/55R20 means
In the size 305/55R20, 305 is the section width in millimeters (12.01 in), 55 is the aspect ratio — the sidewall stands 55% as tall as the tire is wide, or 167.8 mm (6.60 in) — R denotes radial construction, and 20 is the wheel diameter in inches. That works out to an overall diameter of about 33.21 inches, turning roughly 607 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 20 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 125 — a maximum load of 3,638 lbs per tire, or 122 (3,307 lbs) per tire when mounted as duals. The speed symbol Q corresponds to a maximum sustained speed of 99 mph.
Load Range F corresponds to a 12-ply rating.
Specifications
| Size | LT305/55R20/12 |
| Tire Type | All Terrain |
| Service Description | 125/122Q |
| Load Index | 125/122 |
| Speed Rating | Q |
| Load Range | F (12 Ply) |
| Section Width (mm) | 305 |
| Aspect Ratio | 55 |
| Overall Diameter (in) | 20 |
| Tread Depth (/32") | 19.5 |
Frequently asked questions
What kind of tire is the Toyo Open Country M/T?
The Toyo Open Country M/T in 305/55R20 is a all terrain tire.
Will 305/55R20 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 305/55R20, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right. See every 305/55R20 tire in stock to compare options.
What does 125/122Q mean on the Toyo Open Country M/T?
125/122Q breaks down as load index 125 — rated for 3,638 lbs per tire (122, or 3,307 lbs, in dual fitment) — with a Q speed rating, good for a maximum sustained 99 mph.
Keep shopping
Shop all 305/55R20 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:
- LT305/55R20/12
- Aspect Ratio:
- 55
- Load Index:
- 125/122
- Load Range:
- F (12 Ply)
- Section Width:
- 305
- Service Description:
- 125/122Q
- Speed Index:
- Q
- Temperature:
- N/A
- Tire Rim Diameter:
- 20
- Tire Type:
- All Terrain
- Traction:
- N/A
- Tread Wear:
- N/A
- Tread Depth:
- 19.5
- UQTG:
- N/A
- Warranty:
- N/A
PRODUCT REVIEWS (0)
Overall Rankings
Have you tried this product?
WRITE A REVIEWNo reviews for this product yet. Be the first to write a review!
Write a Review