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Kumho
Kumho Ecsta ASX (KU21) 255/45ZR17 98W - 1742413
Kumho Ecsta ASX (KU21) 255/45ZR17 98W - 1742413
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Shop the Kumho Ecsta ASX (KU21) 255/45R17 at ThreePiece.us — free shipping on every order, Affirm financing available, and fast delivery nationwide.
What 255/45R17 means
In the size 255/45R17, 255 is the section width in millimeters (10.04 in), 45 is the aspect ratio — the sidewall stands 45% as tall as the tire is wide, or 114.8 mm (4.52 in) — R denotes radial construction, and 17 is the wheel diameter in inches. That works out to an overall diameter of about 26.04 inches, turning roughly 775 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 98 — a maximum load of 1,653 lbs per tire. The speed symbol W corresponds to a maximum sustained speed of 168 mph.
Specifications
| Size | 255/45ZR17 |
| Tire Type | All Season |
| Service Description | 98W |
| Load Index | 98 |
| Speed Rating | W |
| Load Range | Standard Load |
| Section Width (mm) | 255 |
| Aspect Ratio | 45 |
| Overall Diameter (in) | 26.1 |
| Tread Depth (/32") | 10.5 |
| Treadwear | 420 |
| Traction Grade | AA |
| Temperature Grade | A |
| UTQG | 420AAA |
| Warranty | 30K |
Frequently asked questions
What are the treadwear and warranty ratings on the Kumho Ecsta ASX (KU21)?
This tire carries a treadwear grade of 420, traction grade AA, temperature grade A under UTQG. The manufacturer's warranty is 30K.
What does 98W mean on the Kumho Ecsta ASX (KU21)?
98W breaks down as load index 98 — rated for 1,653 lbs per tire — with a W speed rating, good for a maximum sustained 168 mph.
What kind of tire is the Kumho Ecsta ASX (KU21)?
The Kumho Ecsta ASX (KU21) in 255/45R17 is a all season tire.
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Browse Kumho tires, see every Kumho Ecsta ASX (KU21) size, or view all tires at ThreePiece.us.
- BRAND:
- Kumho
- Model:
- Ecsta ASX (KU21)
- Size:
- 255/45ZR17
- Aspect Ratio:
- 45
- Load Index:
- 98
- Load Range:
- Standard Load
- Section Width:
- 255
- Service Description:
- 98W
- Speed Index:
- W
- Temperature:
- A
- Tire Rim Diameter:
- 26.1
- Tire Type:
- All Season
- Traction:
- AA
- Tread Wear:
- 420
- Tread Depth:
- 10.5
- UQTG:
- 420AAA
- Warranty:
- 30K
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