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Kumho
Kumho Ecsta PS91 245/40ZR18XL 97(Y) - 2167313
Kumho Ecsta PS91 245/40ZR18XL 97(Y) - 2167313
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Looking for a 245/40R18 summer tire? The Kumho Ecsta PS91 is available now at ThreePiece.us with free shipping on every order and Affirm financing at checkout.
What 245/40R18 means
In the size 245/40R18, 245 is the section width in millimeters (9.65 in), 40 is the aspect ratio — the sidewall stands 40% as tall as the tire is wide, or 98.0 mm (3.86 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 25.72 inches, turning roughly 784 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 97 — a maximum load of 1,609 lbs per tire. The speed symbol Y corresponds to a maximum sustained speed of 186 mph.
Load Range E corresponds to a 10-ply rating.
Specifications
| Size | 245/40ZR18XL |
| Tire Type | Summer |
| Service Description | 97Y |
| Load Index | 97 |
| Speed Rating | Y |
| Load Range | Extra Load |
| Section Width (mm) | 245 |
| Aspect Ratio | 40 |
| Overall Diameter (in) | 25.7 |
| Tread Depth (/32") | 9.5 |
| Treadwear | 260 |
| Traction Grade | AA |
| Temperature Grade | A |
| UTQG | 260AAA |
Frequently asked questions
What kind of tire is the Kumho Ecsta PS91?
The Kumho Ecsta PS91 in 245/40R18 is a summer tire.
What are the treadwear and warranty ratings on the Kumho Ecsta PS91?
This tire carries a treadwear grade of 260, traction grade AA, temperature grade A under UTQG.
What does 97Y mean on the Kumho Ecsta PS91?
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.
Keep shopping
Shop all 245/40R18 tires, browse Kumho tires, see every Kumho Ecsta PS91 size, or view all tires at ThreePiece.us.
- BRAND:
- Kumho
- Model:
- Ecsta PS91
- Size:
- 245/40ZR18XL
- Aspect Ratio:
- 40
- Load Index:
- 97
- Load Range:
- Extra Load
- Section Width:
- 245
- Service Description:
- 97Y
- Speed Index:
- Y
- Temperature:
- A
- Tire Rim Diameter:
- 25.7
- Tire Type:
- Summer
- Traction:
- AA
- Tread Wear:
- 260
- Tread Depth:
- 9.5
- UQTG:
- 260AAA
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