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Pirelli
Pirelli PIR PZero All Season 245/50R18
Pirelli PIR PZero All Season 245/50R18
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Shop the Pirelli PZero All Season 245/50R18 at ThreePiece.us — free shipping on every order, Affirm financing available, and fast delivery nationwide.
What 245/50R18 means
In the size 245/50R18, 245 is the section width in millimeters (9.65 in), 50 is the aspect ratio — the sidewall stands 50% as tall as the tire is wide, or 122.5 mm (4.82 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 27.65 inches, turning roughly 730 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 18 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 104 — a maximum load of 1,984 lbs per tire. The speed symbol W corresponds to a maximum sustained speed of 168 mph.
Specifications
| Size | 245/50R18 |
| Tire Type | High-Performance |
| Service Description | 104W |
| Load Index | 104 |
| Speed Rating | W |
| Load Range | XL |
| Section Width (mm) | 245 |
| Aspect Ratio | 50 |
| Overall Diameter (in) | 18 |
| Tread Depth (/32") | 10 |
| Treadwear | 500 |
| Traction Grade | A |
| Temperature Grade | A |
| UTQG | 500AA |
Frequently asked questions
What are the treadwear and warranty ratings on the Pirelli PZero All Season?
This tire carries a treadwear grade of 500, traction grade A, temperature grade A under UTQG.
What does 104W mean on the Pirelli PZero All Season?
104W breaks down as load index 104 — rated for 1,984 lbs per tire — with a W speed rating, good for a maximum sustained 168 mph.
What kind of tire is the Pirelli PZero All Season?
The Pirelli PZero All Season in 245/50R18 is a high-performance tire.
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Shop all 245/50R18 tires, see every Pirelli PZero All Season size, or view all tires at ThreePiece.us.
- BRAND:
- Pirelli
- Model:
- PIR PZero All Season
- Size:
- 245/50R18
- Aspect Ratio:
- 50
- Load Index:
- 104
- Load Range:
- XL
- Section Width:
- 245
- Service Description:
- 104W
- Speed Index:
- W
- Temperature:
- A
- Tire Rim Diameter:
- 18
- Tire Type:
- High-Performance
- Traction:
- A
- Tread Wear:
- 500
- Tread Depth:
- 10
- UQTG:
- 500AA
- Warranty:
- N/A
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