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Kumho
Kumho Ecsta Sport PS72 255/35R21XL 98Y - 2364733
Kumho Ecsta Sport PS72 255/35R21XL 98Y - 2364733
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The Kumho Ecsta Sport PS72 in 255/35R21 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 255/35R21 means
In the size 255/35R21, 255 is the section width in millimeters (10.04 in), 35 is the aspect ratio — the sidewall stands 35% as tall as the tire is wide, or 89.2 mm (3.51 in) — R denotes radial construction, and 21 is the wheel diameter in inches. That works out to an overall diameter of about 28.03 inches, turning roughly 720 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 Y corresponds to a maximum sustained speed of 186 mph.
Load Range E corresponds to a 10-ply rating.
Specifications
| Size | 255/35R21XL |
| Tire Type | Summer |
| Service Description | 98Y |
| Load Index | 98 |
| Speed Rating | Y |
| Load Range | Extra Load |
| Section Width (mm) | 255 |
| Aspect Ratio | 35 |
| Overall Diameter (in) | 27.99 |
| Tread Depth (/32") | 9.4 |
| Treadwear | 320 |
| Traction Grade | AA |
| Temperature Grade | A |
| UTQG | 320AAA |
| Warranty | 30K |
Frequently asked questions
What does 98Y mean on the Kumho Ecsta Sport PS72?
98Y breaks down as load index 98 — rated for 1,653 lbs per tire — with a Y speed rating, good for a maximum sustained 186 mph.
What kind of tire is the Kumho Ecsta Sport PS72?
The Kumho Ecsta Sport PS72 in 255/35R21 is a summer tire.
What are the treadwear and warranty ratings on the Kumho Ecsta Sport PS72?
This tire carries a treadwear grade of 320, traction grade AA, temperature grade A under UTQG. The manufacturer's warranty is 30K.
Keep shopping
Shop all 255/35R21 tires, browse Kumho tires, see every Kumho Ecsta Sport PS72 size, or view all tires at ThreePiece.us.
- BRAND:
- Kumho
- Model:
- Ecsta Sport PS72
- Size:
- 255/35R21XL
- Aspect Ratio:
- 35
- Load Index:
- 98
- Load Range:
- Extra Load
- Section Width:
- 255
- Service Description:
- 98Y
- Speed Index:
- Y
- Temperature:
- A
- Tire Rim Diameter:
- 27.99
- Tire Type:
- Summer
- Traction:
- AA
- Tread Wear:
- 320
- Tread Depth:
- 9.4
- UQTG:
- 320AAA
- Warranty:
- 30K
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