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Pirelli
Pirelli PIR Scorpion Weatheractive 275/45R21
Pirelli PIR Scorpion Weatheractive 275/45R21
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Shop the Pirelli Scorpion Weatheractive 275/45R21 at ThreePiece.us — free shipping on every order, Affirm financing available, and fast delivery nationwide.
What 275/45R21 means
In the size 275/45R21, 275 is the section width in millimeters (10.83 in), 45 is the aspect ratio — the sidewall stands 45% as tall as the tire is wide, or 123.8 mm (4.87 in) — R denotes radial construction, and 21 is the wheel diameter in inches. That works out to an overall diameter of about 30.74 inches, turning roughly 656 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 21 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 110 — a maximum load of 2,337 lbs per tire. The speed symbol W corresponds to a maximum sustained speed of 168 mph.
Specifications
| Size | 275/45R21 |
| Tire Type | High-Performance |
| Service Description | 110W |
| Load Index | 110 |
| Speed Rating | W |
| Load Range | XL |
| Section Width (mm) | 275 |
| Aspect Ratio | 45 |
| Overall Diameter (in) | 21 |
| Tread Depth (/32") | 12 |
| Treadwear | 700 |
| Traction Grade | A |
| Temperature Grade | A |
| UTQG | 700AA |
| Warranty | 60K |
Frequently asked questions
What are the treadwear and warranty ratings on the Pirelli Scorpion Weatheractive?
This tire carries a treadwear grade of 700, traction grade A, temperature grade A under UTQG. The manufacturer's warranty is 60K.
What does 110W mean on the Pirelli Scorpion Weatheractive?
110W breaks down as load index 110 — rated for 2,337 lbs per tire — with a W speed rating, good for a maximum sustained 168 mph.
What kind of tire is the Pirelli Scorpion Weatheractive?
The Pirelli Scorpion Weatheractive in 275/45R21 is a high-performance tire.
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Shop all 275/45R21 tires, see every Pirelli Scorpion Weatheractive size, or view all tires at ThreePiece.us.
- BRAND:
- Pirelli
- Model:
- PIR Scorpion Weatheractive
- Size:
- 275/45R21
- Aspect Ratio:
- 45
- Load Index:
- 110
- Load Range:
- XL
- Section Width:
- 275
- Service Description:
- 110W
- Speed Index:
- W
- Temperature:
- A
- Tire Rim Diameter:
- 21
- Tire Type:
- High-Performance
- Traction:
- A
- Tread Wear:
- 700
- Tread Depth:
- 12
- UQTG:
- 700AA
- Warranty:
- 60K
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