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American Roadstar
American Roadstar Sport AS 215/45R17
American Roadstar Sport AS 215/45R17
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Shop the American Roadstar Sport AS 215/45R17 at ThreePiece.us — free shipping on every order, Affirm financing available, and fast delivery nationwide.
What 215/45R17 means
In the size 215/45R17, 215 is the section width in millimeters (8.46 in), 45 is the aspect ratio — the sidewall stands 45% as tall as the tire is wide, or 96.8 mm (3.81 in) — R denotes radial construction, and 17 is the wheel diameter in inches. That works out to an overall diameter of about 24.62 inches, turning roughly 819 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 17 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 91 — a maximum load of 1,356 lbs per tire. The speed symbol W corresponds to a maximum sustained speed of 168 mph.
Specifications
| Size | 215/45R17 |
| Service Description | 91W |
| Load Index | 91 |
| Speed Rating | W |
| Section Width (mm) | 215 |
| Aspect Ratio | 45 |
| Overall Diameter (in) | 17 |
| Treadwear | 500 |
| Traction Grade | A |
| Temperature Grade | A |
| UTQG | 500 A A |
Frequently asked questions
Will 215/45R17 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 215/45R17, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right. See every 215/45R17 tire in stock to compare options.
What does 91W mean on the American Roadstar Sport AS?
91W breaks down as load index 91 — rated for 1,356 lbs per tire — with a W speed rating, good for a maximum sustained 168 mph.
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.
Keep shopping
Shop all 215/45R17 tires, see every American Roadstar Sport AS size, or view all tires at ThreePiece.us.
- BRAND:
- American Roadstar
- Model:
- Sport AS
- Size:
- 215/45R17
- Aspect Ratio:
- 45
- Load Index:
- 91
- Load Range:
- N/A
- Section Width:
- 215
- Service Description:
- 91W
- Speed Index:
- W
- Temperature:
- A
- Tire Rim Diameter:
- 17
- Tire Type:
- N/A
- Traction:
- A
- Tread Wear:
- 500
- Max Load (LB):
- 1355.82
- UQTG:
- 500 A A
- Side Wall:
- N/A
- Warranty:
- N/A
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