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Pirelli
Pirelli PIR Scorpion STR P275/55R20
Pirelli PIR Scorpion STR P275/55R20
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The Pirelli Scorpion STR in 275/55R20 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 275/55R20 means
In the size 275/55R20, 275 is the section width in millimeters (10.83 in), 55 is the aspect ratio — the sidewall stands 55% as tall as the tire is wide, or 151.2 mm (5.95 in) — R denotes radial construction, and 20 is the wheel diameter in inches. That works out to an overall diameter of about 31.91 inches, turning roughly 632 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 111 — a maximum load of 2,403 lbs per tire. The speed symbol H corresponds to a maximum sustained speed of 130 mph.
Specifications
| Size | P275/55R20 |
| Tire Type | Highway |
| Service Description | 111H |
| Load Index | 111 |
| Speed Rating | H |
| Load Range | SL |
| Section Width (mm) | 275 |
| Aspect Ratio | 55 |
| Overall Diameter (in) | 20 |
| Tread Depth (/32") | 11 |
| Treadwear | 520 |
| Traction Grade | A |
| Temperature Grade | A |
| UTQG | 520AA |
| Warranty | 65K |
Frequently asked questions
What does 111H mean on the Pirelli Scorpion STR?
111H breaks down as load index 111 — rated for 2,403 lbs per tire — with an H speed rating, good for a maximum sustained 130 mph.
What kind of tire is the Pirelli Scorpion STR?
The Pirelli Scorpion STR in 275/55R20 is a highway tire.
What are the treadwear and warranty ratings on the Pirelli Scorpion STR?
This tire carries a treadwear grade of 520, traction grade A, temperature grade A under UTQG. The manufacturer's warranty is 65K.
Keep shopping
Shop all 275/55R20 tires, see every Pirelli Scorpion STR size, or view all tires at ThreePiece.us.
- BRAND:
- Pirelli
- Model:
- PIR Scorpion STR
- Size:
- P275/55R20
- Aspect Ratio:
- 55
- Load Index:
- 111
- Load Range:
- SL
- Section Width:
- 275
- Service Description:
- 111H
- Speed Index:
- H
- Temperature:
- A
- Tire Rim Diameter:
- 20
- Tire Type:
- Highway
- Traction:
- A
- Tread Wear:
- 520
- Tread Depth:
- 11
- UQTG:
- 520AA
- Warranty:
- 65K
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