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Pirelli
Pirelli P-Zero (PZ4) Sport 255/45R20XL 105Y - 3938900
Pirelli P-Zero (PZ4) Sport 255/45R20XL 105Y - 3938900
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Looking for a 255/45R20 summer tire? The Pirelli P-Zero (PZ4) Sport is available now at ThreePiece.us with free shipping on every order and Affirm financing at checkout.
What 255/45R20 means
In the size 255/45R20, 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 20 is the wheel diameter in inches. That works out to an overall diameter of about 29.04 inches, turning roughly 695 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 105 — a maximum load of 2,039 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 | 255/45R20XL |
| Tire Type | Summer |
| Service Description | 105Y |
| Load Index | 105 |
| Speed Rating | Y |
| Load Range | Extra Load |
| Section Width (mm) | 255 |
| Aspect Ratio | 45 |
| Overall Diameter (in) | 29.06 |
| Tread Depth (/32") | 9 |
| Treadwear | 280 |
| Traction Grade | AA |
| Temperature Grade | A |
| UTQG | 280AAA |
Frequently asked questions
What kind of tire is the Pirelli P-Zero (PZ4) Sport?
The Pirelli P-Zero (PZ4) Sport in 255/45R20 is a summer tire.
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 105Y mean on the Pirelli P-Zero (PZ4) Sport?
105Y breaks down as load index 105 — rated for 2,039 lbs per tire — with a Y speed rating, good for a maximum sustained 186 mph.
Keep shopping
Shop all 255/45R20 tires, 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:
- 255/45R20XL
- Aspect Ratio:
- 45
- Load Index:
- 105
- Load Range:
- Extra Load
- Section Width:
- 255
- Service Description:
- 105Y
- Speed Index:
- Y
- Temperature:
- A
- Tire Rim Diameter:
- 29.06
- Tire Type:
- Summer
- Traction:
- AA
- Tread Wear:
- 280
- Tread Depth:
- 9
- UQTG:
- 280AAA
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