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Pirelli
Pirelli P-Zero (PZ4) Sport 255/45R18 103Y - 3783200
Pirelli P-Zero (PZ4) Sport 255/45R18 103Y - 3783200
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Shop the Pirelli P-Zero (PZ4) Sport 255/45R18 at ThreePiece.us — free shipping on every order, Affirm financing available, and fast delivery nationwide.
What 255/45R18 means
In the size 255/45R18, 255 is the section width in millimeters (10.04 in), 45 is the aspect ratio — the sidewall stands 45% as tall as the tire is wide, or 114.8 mm (4.52 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 27.04 inches, turning roughly 746 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 103 — a maximum load of 1,929 lbs per tire. The speed symbol Y corresponds to a maximum sustained speed of 186 mph.
Load Range E corresponds to a 10-ply rating.
Specifications
| Size | 255/45R18 |
| Tire Type | Summer |
| Service Description | 103Y |
| Load Index | 103 |
| Speed Rating | Y |
| Load Range | Extra Load |
| Section Width (mm) | 255 |
| Aspect Ratio | 45 |
| Overall Diameter (in) | 27.05 |
| Tread Depth (/32") | 10 |
| Treadwear | 280 |
| Traction Grade | AA |
| Temperature Grade | A |
| UTQG | 280AAA |
Frequently asked questions
What are the treadwear and warranty ratings on the Pirelli P-Zero (PZ4) Sport?
This tire carries a treadwear grade of 280, traction grade AA, temperature grade A under UTQG.
What does 103Y mean on the Pirelli P-Zero (PZ4) Sport?
103Y breaks down as load index 103 — rated for 1,929 lbs per tire — with a Y speed rating, good for a maximum sustained 186 mph.
What kind of tire is the Pirelli P-Zero (PZ4) Sport?
The Pirelli P-Zero (PZ4) Sport in 255/45R18 is a summer tire.
Keep shopping
Browse Pirelli tires, see every Pirelli P-Zero (PZ4) Sport size, or view all tires at ThreePiece.us.
- BRAND:
- Pirelli
- Model:
- P-Zero (PZ4) Sport
- Size:
- 255/45R18
- Aspect Ratio:
- 45
- Load Index:
- 103
- Load Range:
- Extra Load
- Section Width:
- 255
- Service Description:
- 103Y
- Speed Index:
- Y
- Temperature:
- A
- Tire Rim Diameter:
- 27.05
- Tire Type:
- Summer
- Traction:
- AA
- Tread Wear:
- 280
- Tread Depth:
- 10
- UQTG:
- 280AAA
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