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Pirelli
Pirelli PIR PZero 285/35R18
Pirelli PIR PZero 285/35R18
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The Pirelli PZero in 285/35R18 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 285/35R18 means
In the size 285/35R18, 285 is the section width in millimeters (11.22 in), 35 is the aspect ratio — the sidewall stands 35% as tall as the tire is wide, or 99.8 mm (3.93 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 25.85 inches, turning roughly 780 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 97 — a maximum load of 1,609 lbs per tire. The speed symbol Y corresponds to a maximum sustained speed of 186 mph.
Specifications
| Size | 285/35R18 |
| Tire Type | High Performance |
| Service Description | 97Y |
| Load Index | 97 |
| Speed Rating | Y |
| Load Range | SL |
| Section Width (mm) | 285 |
| Aspect Ratio | 35 |
| Overall Diameter (in) | 18 |
| Tread Depth (/32") | 9 |
| Treadwear | 220 |
| Traction Grade | AA |
| Temperature Grade | A |
| UTQG | 220AAA |
Frequently asked questions
What does 97Y mean on the Pirelli PZero?
97Y breaks down as load index 97 — rated for 1,609 lbs per tire — with a Y speed rating, good for a maximum sustained 186 mph.
What kind of tire is the Pirelli PZero?
The Pirelli PZero in 285/35R18 is a high performance tire.
What are the treadwear and warranty ratings on the Pirelli PZero?
This tire carries a treadwear grade of 220, traction grade AA, temperature grade A under UTQG.
Keep shopping
See every Pirelli PZero size, or view all tires at ThreePiece.us.
- BRAND:
- Pirelli
- Model:
- PIR PZero
- Size:
- 285/35R18
- Aspect Ratio:
- 35
- Load Index:
- 97
- Load Range:
- SL
- Section Width:
- 285
- Service Description:
- 97Y
- Speed Index:
- Y
- Temperature:
- A
- Tire Rim Diameter:
- 18
- Tire Type:
- High Performance
- Traction:
- AA
- Tread Wear:
- 220
- Tread Depth:
- 9
- UQTG:
- 220AAA
- Warranty:
- N/A
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