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Yokohama
Yokohama YOK A10A 215/45R18
Yokohama YOK A10A 215/45R18
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The Yokohama A10A in 215/45R18 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 215/45R18 means
In the size 215/45R18, 215 is the section width in millimeters (8.46 in), 45 is the aspect ratio — the sidewall stands 45% as tall as the tire is wide, or 96.8 mm (3.81 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 25.62 inches, turning roughly 787 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 89 — a maximum load of 1,279 lbs per tire. The speed symbol W corresponds to a maximum sustained speed of 168 mph.
Specifications
| Size | 215/45R18 |
| Tire Type | High-Performance |
| Service Description | 89W |
| Load Index | 89 |
| Speed Rating | W |
| Load Range | SL |
| Section Width (mm) | 215 |
| Aspect Ratio | 45 |
| Overall Diameter (in) | 18 |
| Tread Depth (/32") | 10 |
| Treadwear | 280 |
| Traction Grade | A |
| Temperature Grade | A |
| UTQG | 280AA |
Frequently asked questions
What does 89W mean on the Yokohama A10A?
89W breaks down as load index 89 — rated for 1,279 lbs per tire — with a W speed rating, good for a maximum sustained 168 mph.
What kind of tire is the Yokohama A10A?
The Yokohama A10A in 215/45R18 is a high-performance tire.
What are the treadwear and warranty ratings on the Yokohama A10A?
This tire carries a treadwear grade of 280, traction grade A, temperature grade A under UTQG.
Keep shopping
Shop all 215/45R18 tires, see every Yokohama A10A size, or view all tires at ThreePiece.us.
- BRAND:
- Yokohama
- Model:
- YOK A10A
- Size:
- 215/45R18
- Aspect Ratio:
- 45
- Load Index:
- 89
- Load Range:
- SL
- Section Width:
- 215
- Service Description:
- 89W
- Speed Index:
- W
- Temperature:
- A
- Tire Rim Diameter:
- 18
- Tire Type:
- High-Performance
- Traction:
- A
- Tread Wear:
- 280
- Tread Depth:
- 10
- UQTG:
- 280AA
- Warranty:
- N/A
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