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Arroyo
Arroyo Grand Sport 2 245/45R18
Arroyo Grand Sport 2 245/45R18
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Looking for a 245/45R18 passenger tire? The Arroyo Grand Sport 2 is available now at ThreePiece.us with free shipping on every order and Affirm financing at checkout.
What 245/45R18 means
In the size 245/45R18, 245 is the section width in millimeters (9.65 in), 45 is the aspect ratio — the sidewall stands 45% as tall as the tire is wide, or 110.2 mm (4.34 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 26.68 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 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 100 — a maximum load of 1,764 lbs per tire. The speed symbol W corresponds to a maximum sustained speed of 168 mph.
Specifications
| Size | 245/45R18 |
| Tire Type | Passenger |
| Service Description | 100W |
| Load Index | 100 |
| Speed Rating | W |
| Load Range | XL |
| Section Width (mm) | 245 |
| Aspect Ratio | 45 |
| Overall Diameter (in) | 18 |
| Treadwear | 400 |
| Traction Grade | A |
| Temperature Grade | A |
| UTQG | 400 A A |
| Warranty | 50000 |
Frequently asked questions
What kind of tire is the Arroyo Grand Sport 2?
The Arroyo Grand Sport 2 in 245/45R18 is a passenger tire.
What are the treadwear and warranty ratings on the Arroyo Grand Sport 2?
This tire carries a treadwear grade of 400, traction grade A, temperature grade A under UTQG. The manufacturer's warranty is 50000.
What does 100W mean on the Arroyo Grand Sport 2?
100W breaks down as load index 100 — rated for 1,764 lbs per tire — with a W speed rating, good for a maximum sustained 168 mph.
Keep shopping
Shop all 245/45R18 tires, see every Arroyo Grand Sport 2 size, or view all tires at ThreePiece.us.
- BRAND:
- Arroyo
- Model:
- Grand Sport 2
- Size:
- 245/45R18
- Aspect Ratio:
- 45
- Load Index:
- 100
- Load Range:
- XL
- Section Width:
- 245
- Service Description:
- 100W
- Speed Index:
- W
- Temperature:
- A
- Tire Rim Diameter:
- 18
- Tire Type:
- Passenger
- Traction:
- A
- Tread Wear:
- 400
- Max Load (LB):
- 1764
- UQTG:
- 400 A A
- Side Wall:
- BSW
- Warranty:
- 50000
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