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Pirelli
Pirelli PIR PZero All Season Plus 245/45R18XL
Pirelli PIR PZero All Season Plus 245/45R18XL
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The Pirelli PZero All Season Plus in 245/45R18 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 245/45R18 means
In the size 245/45R18, 245 is the section width in millimeters (9.65 in), 45 is the aspect ratio — the sidewall stands 45% as tall as the tire is wide, or 110.2 mm (4.34 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 26.68 inches, turning roughly 756 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 100 — a maximum load of 1,764 lbs per tire. The speed symbol Y corresponds to a maximum sustained speed of 186 mph.
Specifications
| Size | 245/45R18xL |
| Tire Type | High-Performance |
| Service Description | 100Y |
| Load Index | 100 |
| Speed Rating | Y |
| Load Range | XL |
| Section Width (mm) | 245 |
| Aspect Ratio | 45 |
| Overall Diameter (in) | 18 |
| Tread Depth (/32") | 10 |
| Treadwear | 500 |
| Traction Grade | AA |
| Temperature Grade | A |
| UTQG | 500AAA |
| Warranty | 50K |
Frequently asked questions
What does 100Y mean on the Pirelli PZero All Season Plus?
100Y breaks down as load index 100 — rated for 1,764 lbs per tire — with a Y speed rating, good for a maximum sustained 186 mph.
What kind of tire is the Pirelli PZero All Season Plus?
The Pirelli PZero All Season Plus in 245/45R18 is a high-performance tire.
What are the treadwear and warranty ratings on the Pirelli PZero All Season Plus?
This tire carries a treadwear grade of 500, traction grade AA, temperature grade A under UTQG. The manufacturer's warranty is 50K.
Keep shopping
Shop all 245/45R18 tires, see every Pirelli PZero All Season Plus size, or view all tires at ThreePiece.us.
- BRAND:
- Pirelli
- Model:
- PIR PZero All Season Plus
- Size:
- 245/45R18xL
- Aspect Ratio:
- 45
- Load Index:
- 100
- Load Range:
- XL
- Section Width:
- 245
- Service Description:
- 100Y
- Speed Index:
- Y
- Temperature:
- A
- Tire Rim Diameter:
- 18
- Tire Type:
- High-Performance
- Traction:
- AA
- Tread Wear:
- 500
- Tread Depth:
- 10
- UQTG:
- 500AAA
- Warranty:
- 50K
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