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Nitto
Nitto NIT NT05 275/40ZR18
Nitto NIT NT05 275/40ZR18
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The Nitto NT05 in 275/40R18 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 275/40R18 means
In the size 275/40R18, 275 is the section width in millimeters (10.83 in), 40 is the aspect ratio — the sidewall stands 40% as tall as the tire is wide, or 110.0 mm (4.33 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 26.66 inches, turning roughly 756 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 99 — a maximum load of 1,709 lbs per tire. The speed symbol W corresponds to a maximum sustained speed of 168 mph.
Specifications
| Size | 275/40ZR18 |
| Tire Type | Summer |
| Service Description | 99W |
| Load Index | 99 |
| Speed Rating | W |
| Load Range | Standard Load |
| Section Width (mm) | 275 |
| Aspect Ratio | 40 |
| Overall Diameter (in) | 26.57 |
| Tread Depth (/32") | 7.2 |
| Treadwear | 200 |
| Traction Grade | AA |
| Temperature Grade | A |
| UTQG | 200AAA |
Frequently asked questions
What does 99W mean on the Nitto NT05?
99W breaks down as load index 99 — rated for 1,709 lbs per tire — with a W speed rating, good for a maximum sustained 168 mph.
What kind of tire is the Nitto NT05?
The Nitto NT05 in 275/40R18 is a summer tire.
What are the treadwear and warranty ratings on the Nitto NT05?
This tire carries a treadwear grade of 200, traction grade AA, temperature grade A under UTQG.
Keep shopping
Shop all 275/40R18 tires, see every Nitto NT05 size, or view all tires at ThreePiece.us.
- Brand:
- Nitto
- Model:
- NT05
- Size:
- 275/40ZR18
- Aspect Ratio:
- 40
- Load Index:
- 99
- Load Range:
- Standard Load
- Section Width:
- 275
- Service Description:
- 99W
- Speed Index:
- W
- Temperature:
- A
- Tire Rim Diameter:
- 26.57
- Tire Type:
- Summer
- Traction:
- AA
- Tread Wear:
- 200
- Tread Depth:
- 7.2
- UQTG:
- 200AAA
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