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Pirelli
Pirelli PIR PZero All Season 235/40R18XL
Pirelli PIR PZero All Season 235/40R18XL
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Looking for a 235/40R18 high-performance tire? The Pirelli PZero All Season is available now at ThreePiece.us with free shipping on every order and Affirm financing at checkout.
What 235/40R18 means
In the size 235/40R18, 235 is the section width in millimeters (9.25 in), 40 is the aspect ratio — the sidewall stands 40% as tall as the tire is wide, or 94.0 mm (3.70 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 25.40 inches, turning roughly 794 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 95 — a maximum load of 1,521 lbs per tire. The speed symbol W corresponds to a maximum sustained speed of 168 mph.
Specifications
| Size | 235/40R18xL |
| Tire Type | High-Performance |
| Service Description | 95W |
| Load Index | 95 |
| Speed Rating | W |
| Load Range | XL |
| Section Width (mm) | 235 |
| Aspect Ratio | 40 |
| Overall Diameter (in) | 18 |
| Tread Depth (/32") | 10 |
| Treadwear | 500 |
| Traction Grade | AA |
| Temperature Grade | A |
| UTQG | 500AAA |
Frequently asked questions
What kind of tire is the Pirelli PZero All Season?
The Pirelli PZero All Season in 235/40R18 is a high-performance tire.
What are the treadwear and warranty ratings on the Pirelli PZero All Season?
This tire carries a treadwear grade of 500, traction grade AA, temperature grade A under UTQG.
What does 95W mean on the Pirelli PZero All Season?
95W breaks down as load index 95 — rated for 1,521 lbs per tire — with a W speed rating, good for a maximum sustained 168 mph.
Keep shopping
Shop all 235/40R18 tires, see every Pirelli PZero All Season size, or view all tires at ThreePiece.us.
- BRAND:
- Pirelli
- Model:
- PIR PZero All Season
- Size:
- 235/40R18xL
- Aspect Ratio:
- 40
- Load Index:
- 95
- Load Range:
- XL
- Section Width:
- 235
- Service Description:
- 95W
- Speed Index:
- W
- Temperature:
- A
- Tire Rim Diameter:
- 18
- Tire Type:
- High-Performance
- Traction:
- AA
- Tread Wear:
- 500
- Tread Depth:
- 10
- UQTG:
- 500AAA
- Warranty:
- N/A
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