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Kumho
Kumho KMH Ecsta STX (KL12) 275/45R20
Kumho KMH Ecsta STX (KL12) 275/45R20
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The Kumho Ecsta STX (KL12) in 275/45R20 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 275/45R20 means
In the size 275/45R20, 275 is the section width in millimeters (10.83 in), 45 is the aspect ratio — the sidewall stands 45% as tall as the tire is wide, or 123.8 mm (4.87 in) — R denotes radial construction, and 20 is the wheel diameter in inches. That works out to an overall diameter of about 29.74 inches, turning roughly 678 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 106 — a maximum load of 2,094 lbs per tire. The speed symbol W corresponds to a maximum sustained speed of 168 mph.
Specifications
| Size | 275/45R20 |
| Tire Type | High Performance |
| Service Description | 106W |
| Load Index | 106 |
| Speed Rating | W |
| Load Range | SL |
| Section Width (mm) | 275 |
| Aspect Ratio | 45 |
| Overall Diameter (in) | 29.8 |
| Tread Depth (/32") | 11.5 |
| Treadwear | 420 |
| Traction Grade | A |
| Temperature Grade | A |
| UTQG | 420AA |
Frequently asked questions
What does 106W mean on the Kumho Ecsta STX (KL12)?
106W breaks down as load index 106 — rated for 2,094 lbs per tire — with a W speed rating, good for a maximum sustained 168 mph.
What kind of tire is the Kumho Ecsta STX (KL12)?
The Kumho Ecsta STX (KL12) in 275/45R20 is a high performance tire.
What are the treadwear and warranty ratings on the Kumho Ecsta STX (KL12)?
This tire carries a treadwear grade of 420, traction grade A, temperature grade A under UTQG.
Keep shopping
Shop all 275/45R20 tires, see every Kumho Ecsta STX (KL12) size, or view all tires at ThreePiece.us.
- Brand:
- Kumho
- Model:
- KMH Ecsta STX (KL12)
- Size:
- 275/45R20
- Aspect Ratio:
- 45
- Load Index:
- 106
- Load Range:
- SL
- Section Width:
- 275
- Service Description:
- 106W
- Speed Index:
- W
- Temperature:
- A
- Tire Rim Diameter:
- 29.8
- Tire Type:
- High Performance
- Traction:
- A
- Tread Wear:
- 420
- Tread Depth:
- 11.5
- UQTG:
- 420AA
- Warranty:
- N/A
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