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Cooper
Cooper Discoverer Road Trail AT 255/65R17 110T - 171280049
Cooper Discoverer Road Trail AT 255/65R17 110T - 171280049
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The Cooper Discoverer Road Trail AT in 255/65R17 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 255/65R17 means
In the size 255/65R17, 255 is the section width in millimeters (10.04 in), 65 is the aspect ratio — the sidewall stands 65% as tall as the tire is wide, or 165.8 mm (6.53 in) — R denotes radial construction, and 17 is the wheel diameter in inches. That works out to an overall diameter of about 30.05 inches, turning roughly 671 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 service description on this tire decodes to a load index of 110 — a maximum load of 2,337 lbs per tire. The speed symbol T corresponds to a maximum sustained speed of 118 mph.
Specifications
| Size | 255/65R17 |
| Tire Type | All Season |
| Service Description | 110T |
| Load Index | 110 |
| Speed Rating | T |
| Section Width (mm) | 255 |
| Aspect Ratio | 65 |
| Overall Diameter (in) | 30.08 |
| Tread Depth (/32") | 13 |
| Treadwear | 620 |
| Traction Grade | A |
| Temperature Grade | B |
| UTQG | 620AB |
| Warranty | 65K |
Frequently asked questions
What does 110T mean on the Cooper Discoverer Road Trail AT?
110T breaks down as load index 110 — rated for 2,337 lbs per tire — with a T speed rating, good for a maximum sustained 118 mph.
What kind of tire is the Cooper Discoverer Road Trail AT?
The Cooper Discoverer Road Trail AT in 255/65R17 is a all season tire.
What are the treadwear and warranty ratings on the Cooper Discoverer Road Trail AT?
This tire carries a treadwear grade of 620, traction grade A, temperature grade B under UTQG. The manufacturer's warranty is 65K.
Keep shopping
Shop all 255/65R17 tires, browse Cooper tires, see every Cooper Discoverer Road Trail AT size, or view all tires at ThreePiece.us.
- BRAND:
- Cooper
- Model:
- Discoverer Road Trail AT
- Size:
- 255/65R17
- Aspect Ratio:
- 65
- Load Index:
- 110
- Section Width:
- 255
- Service Description:
- 110T
- Speed Index:
- T
- Temperature:
- B
- Tire Rim Diameter:
- 30.08
- Tire Type:
- All Season
- Traction:
- A
- Tread Wear:
- 620
- Tread Depth:
- 13
- UQTG:
- 620AB
- Warranty:
- 65K
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