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Pirelli
Pirelli P-Zero (PZ4) 255/40R20XL 101Y - 4102300
Pirelli P-Zero (PZ4) 255/40R20XL 101Y - 4102300
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The Pirelli P-Zero (PZ4) in 255/40R20 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 255/40R20 means
In the size 255/40R20, 255 is the section width in millimeters (10.04 in), 40 is the aspect ratio — the sidewall stands 40% as tall as the tire is wide, or 102.0 mm (4.02 in) — R denotes radial construction, and 20 is the wheel diameter in inches. That works out to an overall diameter of about 28.03 inches, turning roughly 719 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 101 — a maximum load of 1,819 lbs per tire. The speed symbol Y corresponds to a maximum sustained speed of 186 mph.
Specifications
| Size | 255/40R20XL |
| Tire Type | Summer |
| Service Description | 101Y |
| Load Index | 101 |
| Speed Rating | Y |
| Section Width (mm) | 255 |
| Aspect Ratio | 40 |
| Overall Diameter (in) | 28.03 |
| Tread Depth (/32") | 10 |
| Treadwear | 220 |
| Traction Grade | AA |
| Temperature Grade | A |
| UTQG | 220AAA |
Frequently asked questions
What does 101Y mean on the Pirelli P-Zero (PZ4)?
101Y breaks down as load index 101 — rated for 1,819 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)?
The Pirelli P-Zero (PZ4) in 255/40R20 is a summer tire.
What are the treadwear and warranty ratings on the Pirelli P-Zero (PZ4)?
This tire carries a treadwear grade of 220, traction grade AA, temperature grade A under UTQG.
Keep shopping
Shop all 255/40R20 tires, browse Pirelli tires, see every Pirelli P-Zero (PZ4) size, or view all tires at ThreePiece.us.
- BRAND:
- Pirelli
- Model:
- P-Zero (PZ4)
- Size:
- 255/40R20XL
- Aspect Ratio:
- 40
- Load Index:
- 101
- Section Width:
- 255
- Service Description:
- 101Y
- Speed Index:
- Y
- Temperature:
- A
- Tire Rim Diameter:
- 28.03
- Tire Type:
- Summer
- Traction:
- AA
- Tread Wear:
- 220
- Tread Depth:
- 10
- UQTG:
- 220AAA
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