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Nexen
Nexen NEX N'Fera SU1 245/40R20
Nexen NEX N'Fera SU1 245/40R20
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Shop the Nexen N'Fera SU1 245/40R20 at ThreePiece.us — free shipping on every order, Affirm financing available, and fast delivery nationwide.
What 245/40R20 means
In the size 245/40R20, 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 20 is the wheel diameter in inches. That works out to an overall diameter of about 27.72 inches, turning roughly 728 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 20 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 99 — a maximum load of 1,709 lbs per tire. The speed symbol Y corresponds to a maximum sustained speed of 186 mph.
Specifications
| Size | 245/40R20 |
| Tire Type | High Performance |
| Service Description | 99Y |
| Load Index | 99 |
| Speed Rating | Y |
| Load Range | XL |
| Section Width (mm) | 245 |
| Aspect Ratio | 40 |
| Overall Diameter (in) | 20 |
| Tread Depth (/32") | 9.5 |
| Treadwear | 300 |
| Traction Grade | AA |
| Temperature Grade | A |
| UTQG | 300AAA |
| Warranty | 25K |
Frequently asked questions
What are the treadwear and warranty ratings on the Nexen N'Fera SU1?
This tire carries a treadwear grade of 300, traction grade AA, temperature grade A under UTQG. The manufacturer's warranty is 25K.
What does 99Y mean on the Nexen N'Fera SU1?
99Y breaks down as load index 99 — rated for 1,709 lbs per tire — with a Y speed rating, good for a maximum sustained 186 mph.
What kind of tire is the Nexen N'Fera SU1?
The Nexen N'Fera SU1 in 245/40R20 is a high performance tire.
Keep shopping
Shop all 245/40R20 tires, see every Nexen N'Fera SU1 size, or view all tires at ThreePiece.us.
- BRAND:
- Nexen
- Model:
- NEX N'Fera SU1
- Size:
- 245/40R20
- Aspect Ratio:
- 40
- Load Index:
- 99
- Load Range:
- XL
- Section Width:
- 245
- Service Description:
- 99Y
- Speed Index:
- Y
- Temperature:
- A
- Tire Rim Diameter:
- 20
- Tire Type:
- High Performance
- Traction:
- AA
- Tread Wear:
- 300
- Tread Depth:
- 9.5
- UQTG:
- 300AAA
- Warranty:
- 25K
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