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Arroyo
Arroyo Grand Sport AS 245/50ZR18
Arroyo Grand Sport AS 245/50ZR18
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The Arroyo Grand Sport AS in 245/50R18 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 245/50R18 means
In the size 245/50R18, 245 is the section width in millimeters (9.65 in), 50 is the aspect ratio — the sidewall stands 50% as tall as the tire is wide, or 122.5 mm (4.82 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 27.65 inches, turning roughly 730 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 | 245/50ZR18 |
| Tire Type | Passenger |
| Service Description | 100W |
| Load Index | 100 |
| Speed Rating | W |
| Load Range | SL |
| Section Width (mm) | 245 |
| Aspect Ratio | 50 |
| Overall Diameter (in) | 18 |
| Treadwear | 500 |
| Traction Grade | A |
| Temperature Grade | A |
| UTQG | 500 A A |
Frequently asked questions
What does 100W mean on the Arroyo Grand Sport AS?
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.
What kind of tire is the Arroyo Grand Sport AS?
The Arroyo Grand Sport AS in 245/50R18 is a passenger tire.
What are the treadwear and warranty ratings on the Arroyo Grand Sport AS?
This tire carries a treadwear grade of 500, traction grade A, temperature grade A under UTQG.
Keep shopping
Shop all 245/50R18 tires, see every Arroyo Grand Sport AS size, or view all tires at ThreePiece.us.
- BRAND:
- Arroyo
- Model:
- Grand Sport AS
- Size:
- 245/50ZR18
- Aspect Ratio:
- 50
- Load Index:
- 100
- Load Range:
- SL
- Section Width:
- 245
- Service Description:
- 100W
- Speed Index:
- W
- Temperature:
- A
- Tire Rim Diameter:
- 18
- Tire Type:
- Passenger
- Traction:
- A
- Tread Wear:
- 500
- Max Load (LB):
- 1764
- UQTG:
- 500 A A
- Side Wall:
- BSW
- Warranty:
- N/A
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