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Cooper Discoverer SRX 255/55R20XL 110H - 166562019
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Cooper
SKU:
166562019
|
- UPC:
- 00029142814443
- Availability:
- Y
$ 907.96 set | $226.99 each
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- Width:
- 10.30 (in)
- Height:
- 31.22 (in)
- Depth:
- 31.22 (in)
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Looking for a 255/55R20 all season tire? The Cooper Discoverer SRX is available now at ThreePiece.us with free shipping on every order and Affirm financing at checkout.
What 255/55R20 means
In the size 255/55R20, 255 is the section width in millimeters (10.04 in), 55 is the aspect ratio — the sidewall stands 55% as tall as the tire is wide, or 140.2 mm (5.52 in) — R denotes radial construction, and 20 is the wheel diameter in inches. That works out to an overall diameter of about 31.04 inches, turning roughly 650 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 31.22 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 110 — a maximum load of 2,337 lbs per tire. The speed symbol H corresponds to a maximum sustained speed of 130 mph.
Specifications
| Size | 255/55R20XL |
| Tire Type | All Season |
| Service Description | 110H |
| Load Index | 110 |
| Speed Rating | H |
| Load Range | XL |
| Section Width (mm) | 255 |
| Aspect Ratio | 55 |
| Overall Diameter (in) | 31.22 |
| Tread Depth (/32") | 11.5 |
| Treadwear | 740 |
| Traction Grade | A |
| Temperature Grade | A |
| UTQG | 740AA |
| Warranty | 75K |
Frequently asked questions
What kind of tire is the Cooper Discoverer SRX?
The Cooper Discoverer SRX in 255/55R20 is a all season tire.
What are the treadwear and warranty ratings on the Cooper Discoverer SRX?
This tire carries a treadwear grade of 740, traction grade A, temperature grade A under UTQG. The manufacturer's warranty is 75K.
What does 110H mean on the Cooper Discoverer SRX?
110H breaks down as load index 110 — rated for 2,337 lbs per tire — with an H speed rating, good for a maximum sustained 130 mph.
Keep shopping
Shop all 255/55R20 tires, browse Cooper tires, see every Cooper Discoverer SRX size, or view all tires at ThreePiece.us.
- BRAND:
- Cooper
- Model:
- Discoverer SRX
- Size:
- 255/55R20XL
- Aspect Ratio:
- 55
- Load Index:
- 110
- Load Range:
- XL
- Section Width:
- 255
- Service Description:
- 110H
- Speed Index:
- H
- Temperature:
- A
- Tire Rim Diameter:
- 31.22
- Tire Type:
- All Season
- Traction:
- A
- Tread Wear:
- 740
- Tread Depth:
- 11.5
- UQTG:
- 740AA
- Warranty:
- 75K
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