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Pirelli
Pirelli PIR Cinturato P7 (P7C2) 225/45R18 91Y
Pirelli PIR Cinturato P7 (P7C2) 225/45R18 91Y
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Looking for a 225/45R18 high-performance tire? The Pirelli Cinturato P7 (P7C2) is available now at ThreePiece.us with free shipping on every order and Affirm financing at checkout.
What 225/45R18 means
In the size 225/45R18, 225 is the section width in millimeters (8.86 in), 45 is the aspect ratio — the sidewall stands 45% as tall as the tire is wide, or 101.2 mm (3.99 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 25.97 inches, turning roughly 777 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 91 — a maximum load of 1,356 lbs per tire. The speed symbol Y corresponds to a maximum sustained speed of 186 mph.
Specifications
| Size | 225/45R18 |
| Tire Type | High-Performance |
| Service Description | 91Y |
| Load Index | 91 |
| Speed Rating | Y |
| Section Width (mm) | 225 |
| Aspect Ratio | 45 |
| Overall Diameter (in) | 18 |
| Tread Depth (/32") | 11 |
| Treadwear | 320 |
| Traction Grade | AA |
| Temperature Grade | A |
| UTQG | 320AAA |
Frequently asked questions
What kind of tire is the Pirelli Cinturato P7 (P7C2)?
The Pirelli Cinturato P7 (P7C2) in 225/45R18 is a high-performance tire.
What are the treadwear and warranty ratings on the Pirelli Cinturato P7 (P7C2)?
This tire carries a treadwear grade of 320, traction grade AA, temperature grade A under UTQG.
What does 91Y mean on the Pirelli Cinturato P7 (P7C2)?
91Y breaks down as load index 91 — rated for 1,356 lbs per tire — with a Y speed rating, good for a maximum sustained 186 mph.
Keep shopping
Shop all 225/45R18 tires, see every Pirelli Cinturato P7 (P7C2) size, or view all tires at ThreePiece.us.
- Brand:
- Pirelli
- Model:
- PIR Cinturato P7 (P7C2)
- Size:
- 225/45R18
- Aspect Ratio:
- 45
- Load Index:
- 91
- Load Range:
- N/A
- Section Width:
- 225
- Service Description:
- 91Y
- Speed Index:
- Y
- Temperature:
- A
- Tire Rim Diameter:
- 18
- Tire Type:
- High-Performance
- Traction:
- AA
- Tread Wear:
- 320
- Tread Depth:
- 11
- UQTG:
- 320AAA
- Warranty:
- N/A
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