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Accelera
Accelera PHI 215/40R18
Accelera PHI 215/40R18
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The Accelera PHI in 215/40R18 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 215/40R18 means
In the size 215/40R18, 215 is the section width in millimeters (8.46 in), 40 is the aspect ratio — the sidewall stands 40% as tall as the tire is wide, or 86.0 mm (3.39 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 24.77 inches, turning roughly 814 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 91 — a maximum load of 1,356 lbs per tire. The speed symbol W corresponds to a maximum sustained speed of 168 mph.
Specifications
| Size | 215/40R18 |
| Service Description | 91W |
| Load Index | 91 |
| Speed Rating | W |
| Load Range | XL |
| Section Width (mm) | 215 |
| Aspect Ratio | 40 |
| Temperature Grade | ATIRE RIM DIAMETER=18TIRE TYPE=High PerformanceTRACTION=AATREAD WEAR=400TREAD DEPTH=UQTG=400 AA AWARRANTY=30000 |
Frequently asked questions
What does 91W mean on the Accelera PHI?
91W breaks down as load index 91 — rated for 1,356 lbs per tire — with a W speed rating, good for a maximum sustained 168 mph.
Will 215/40R18 tires fit my vehicle?
Check the size molded into your current tire's sidewall or the tire placard inside the driver's door jamb — if it reads 215/40R18, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right.
How fast does this tire ship?
Every order at ThreePiece.us ships free, with fast delivery from a nationwide warehouse network. Affirm financing is available at checkout.
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Browse Accelera tires, see every Accelera PHI size, or view all tires at ThreePiece.us.
- BRAND:
- Accelera
- MODEL:
- PHI
- SIZE:
- 215/40R18
- ASPECT RATIO:
- 40
- LOAD INDEX:
- 91
- LOAD RANGE:
- XL
- SECTION WIDTH:
- 215
- SERVICE DESCRIPTION:
- 91W
- SPEED INDEX:
- W
- TEMPERATURE:
- ATIRE RIM DIAMETER=18TIRE TYPE=High PerformanceTRACTION=AATREAD WEAR=400TREAD DEPTH=UQTG=400 AA AWARRANTY=30000
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