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American Roadstar
American Roadstar Sport AS 245/40R19
American Roadstar Sport AS 245/40R19
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Shop the American Roadstar Sport AS 245/40R19 at ThreePiece.us — free shipping on every order, Affirm financing available, and fast delivery nationwide.
What 245/40R19 means
In the size 245/40R19, 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 19 is the wheel diameter in inches. That works out to an overall diameter of about 26.72 inches, turning roughly 755 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 19 inches — when clearance is tight, go by the published figure rather than the nominal size math.
Specifications
| Size | 245/40R19 |
| Service Description | 98W/Y |
| Load Index | 98 |
| Speed Rating | W/Y |
| Section Width (mm) | 245 |
| Aspect Ratio | 40 |
| Overall Diameter (in) | 19 |
| Treadwear | 500 |
| Traction Grade | A |
| Temperature Grade | A |
| UTQG | 500 A A |
Frequently asked questions
How fast does this tire ship?
Every order at ThreePiece.us ships free, with fast delivery from a nationwide warehouse network. Affirm financing is available at checkout.
What are the treadwear and warranty ratings on the American Roadstar Sport AS?
This tire carries a treadwear grade of 500, traction grade A, temperature grade A under UTQG.
Will 245/40R19 tires fit my vehicle?
Check the size molded into your current tire's sidewall or the tire placard inside the driver's door jamb — if it reads 245/40R19, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right. See every 245/40R19 tire in stock to compare options.
Keep shopping
Shop all 245/40R19 tires, see every American Roadstar Sport AS size, or view all tires at ThreePiece.us.
- BRAND:
- American Roadstar
- Model:
- Sport AS
- Size:
- 245/40R19
- Aspect Ratio:
- 40
- Load Index:
- 98
- Load Range:
- N/A
- Section Width:
- 245
- Service Description:
- 98W/Y
- Speed Index:
- W/Y
- Temperature:
- A
- Tire Rim Diameter:
- 19
- Tire Type:
- N/A
- Traction:
- A
- Tread Wear:
- 500
- Max Load (LB):
- 1653.44
- UQTG:
- 500 A A
- Side Wall:
- N/A
- Warranty:
- N/A
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