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Nokian
Nokian Outpost Apt 255/50R20XL 109H - T432116
Nokian Outpost Apt 255/50R20XL 109H - T432116
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The Nokian Outpost Apt in 255/50R20 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 255/50R20 means
In the size 255/50R20, 255 is the section width in millimeters (10.04 in), 50 is the aspect ratio — the sidewall stands 50% as tall as the tire is wide, or 127.5 mm (5.02 in) — R denotes radial construction, and 20 is the wheel diameter in inches. That works out to an overall diameter of about 30.04 inches, turning roughly 671 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 service description on this tire decodes to a load index of 109 — a maximum load of 2,271 lbs per tire. The speed symbol H corresponds to a maximum sustained speed of 130 mph.
Load Range E corresponds to a 10-ply rating.
Specifications
| Size | 255/50R20XL |
| Tire Type | All Season |
| Service Description | 109H |
| Load Index | 109 |
| Speed Rating | H |
| Load Range | Extra Load |
| Section Width (mm) | 255 |
| Aspect Ratio | 50 |
| Overall Diameter (in) | 30.1 |
| Tread Depth (/32") | 13 |
| Treadwear | 700 |
| Traction Grade | A |
| Temperature Grade | A |
| UTQG | 700AA |
| Warranty | 65K |
Frequently asked questions
What does 109H mean on the Nokian Outpost Apt?
109H breaks down as load index 109 — rated for 2,271 lbs per tire — with an H speed rating, good for a maximum sustained 130 mph.
What kind of tire is the Nokian Outpost Apt?
The Nokian Outpost Apt in 255/50R20 is a all season tire.
What are the treadwear and warranty ratings on the Nokian Outpost Apt?
This tire carries a treadwear grade of 700, traction grade A, temperature grade A under UTQG. The manufacturer's warranty is 65K.
Keep shopping
Shop all 255/50R20 tires, browse Nokian tires, see every Nokian Outpost Apt size, or view all tires at ThreePiece.us.
- Brand:
- Nokian
- Model:
- Outpost Apt
- Size:
- 255/50R20XL
- Aspect Ratio:
- 50
- Load Index:
- 109
- Load Range:
- Extra Load
- Section Width:
- 255
- Service Description:
- 109H
- Speed Index:
- H
- Temperature:
- A
- Tire Rim Diameter:
- 30.1
- Tire Type:
- All Season
- Traction:
- A
- Tread Wear:
- 700
- Tread Depth:
- 13
- UQTG:
- 700AA
- Warranty:
- 65K
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