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Mastercraft
Mastercraft MSC Avenger M8 245/40R18XL
Mastercraft MSC Avenger M8 245/40R18XL
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Looking for a 245/40R18 high performance tire? The Mastercraft Avenger M8 is available now at ThreePiece.us with free shipping on every order and Affirm financing at checkout.
What 245/40R18 means
In the size 245/40R18, 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 18 is the wheel diameter in inches. That works out to an overall diameter of about 25.72 inches, turning roughly 784 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 18 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 97 — a maximum load of 1,609 lbs per tire. The speed symbol W corresponds to a maximum sustained speed of 168 mph.
Specifications
| Size | 245/40R18XL |
| Tire Type | High Performance |
| Service Description | 97W |
| Load Index | 97 |
| Speed Rating | W |
| Load Range | XL |
| Section Width (mm) | 245 |
| Aspect Ratio | 40 |
| Overall Diameter (in) | 18 |
| Tread Depth (/32") | 10.5 |
| Treadwear | 360 |
| Traction Grade | A |
| Temperature Grade | A |
| UTQG | 360AA |
| Warranty | 40K |
Frequently asked questions
What kind of tire is the Mastercraft Avenger M8?
The Mastercraft Avenger M8 in 245/40R18 is a high performance tire.
What are the treadwear and warranty ratings on the Mastercraft Avenger M8?
This tire carries a treadwear grade of 360, traction grade A, temperature grade A under UTQG. The manufacturer's warranty is 40K.
What does 97W mean on the Mastercraft Avenger M8?
97W breaks down as load index 97 — rated for 1,609 lbs per tire — with a W speed rating, good for a maximum sustained 168 mph.
Keep shopping
Shop all 245/40R18 tires, see every Mastercraft Avenger M8 size, or view all tires at ThreePiece.us.
- BRAND:
- Mastercraft
- Model:
- MSC Avenger M8
- Size:
- 245/40R18XL
- Aspect Ratio:
- 40
- Load Index:
- 97
- Load Range:
- XL
- Section Width:
- 245
- Service Description:
- 97W
- Speed Index:
- W
- Temperature:
- A
- Tire Rim Diameter:
- 18
- Tire Type:
- High Performance
- Traction:
- A
- Tread Wear:
- 360
- Tread Depth:
- 10.5
- UQTG:
- 360AA
- Warranty:
- 40K
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