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Pirelli
Pirelli P-Zero (PZ4) 275/40R18XL 103Y - 3872100
Pirelli P-Zero (PZ4) 275/40R18XL 103Y - 3872100
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Looking for a 275/40R18 summer tire? The Pirelli P-Zero (PZ4) is available now at ThreePiece.us with free shipping on every order and Affirm financing at checkout.
What 275/40R18 means
In the size 275/40R18, 275 is the section width in millimeters (10.83 in), 40 is the aspect ratio — the sidewall stands 40% as tall as the tire is wide, or 110.0 mm (4.33 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 26.66 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 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 | 275/40R18XL |
| Tire Type | Summer |
| Service Description | 103Y |
| Load Index | 103 |
| Speed Rating | Y |
| Load Range | Extra Load |
| Section Width (mm) | 275 |
| Aspect Ratio | 40 |
| Overall Diameter (in) | 26.65 |
| Tread Depth (/32") | 7 |
| Treadwear | 280 |
| Traction Grade | AA |
| Temperature Grade | A |
| UTQG | 280AAA |
Frequently asked questions
What kind of tire is the Pirelli P-Zero (PZ4)?
The Pirelli P-Zero (PZ4) in 275/40R18 is a summer tire.
What are the treadwear and warranty ratings on the Pirelli P-Zero (PZ4)?
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)?
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.
Keep shopping
Shop all 275/40R18 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:
- 275/40R18XL
- Aspect Ratio:
- 40
- Load Index:
- 103
- Load Range:
- Extra Load
- Section Width:
- 275
- Service Description:
- 103Y
- Speed Index:
- Y
- Temperature:
- A
- Tire Rim Diameter:
- 26.65
- Tire Type:
- Summer
- Traction:
- AA
- Tread Wear:
- 280
- Tread Depth:
- 7
- UQTG:
- 280AAA
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