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American Roadstar
American Roadstar AT 275/55R20
American Roadstar AT 275/55R20
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Looking for a 275/55R20 tire? The American Roadstar AT is available now at ThreePiece.us with free shipping on every order and Affirm financing at checkout.
What 275/55R20 means
In the size 275/55R20, 275 is the section width in millimeters (10.83 in), 55 is the aspect ratio — the sidewall stands 55% as tall as the tire is wide, or 151.2 mm (5.95 in) — R denotes radial construction, and 20 is the wheel diameter in inches. That works out to an overall diameter of about 31.91 inches, turning roughly 632 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 20 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 117 — a maximum load of 2,833 lbs per tire. The speed symbol H corresponds to a maximum sustained speed of 130 mph.
Specifications
| Size | 275/55R20 |
| Service Description | 117H |
| Load Index | 117 |
| Speed Rating | H |
| Section Width (mm) | 275 |
| Aspect Ratio | 55 |
| Overall Diameter (in) | 20 |
| Treadwear | 500 |
| Traction Grade | A |
| Temperature Grade | A |
| UTQG | 500 AA |
Frequently asked questions
What are the treadwear and warranty ratings on the American Roadstar AT?
This tire carries a treadwear grade of 500, traction grade A, temperature grade A under UTQG.
Will 275/55R20 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 275/55R20, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right. See every 275/55R20 tire in stock to compare options.
What does 117H mean on the American Roadstar AT?
117H breaks down as load index 117 — rated for 2,833 lbs per tire — with an H speed rating, good for a maximum sustained 130 mph.
Keep shopping
Shop all 275/55R20 tires, see every American Roadstar AT size, or view all tires at ThreePiece.us.
- BRAND:
- American Roadstar
- Model:
- AT
- Size:
- 275/55R20
- Aspect Ratio:
- 55
- Load Index:
- 117
- Load Range:
- N/A
- Section Width:
- 275
- Service Description:
- 117H
- Speed Index:
- H
- Temperature:
- A
- Tire Rim Diameter:
- 20
- Tire Type:
- N/A
- Traction:
- A
- Tread Wear:
- 500
- Max Load (LB):
- 2833
- UQTG:
- 500 AA
- Side Wall:
- N/A
- Warranty:
- N/A
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