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Cooper Tires
Cooper Tires COO Discoverer AT3 4S 265/50R20XL
Cooper Tires COO Discoverer AT3 4S 265/50R20XL
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Shop the Cooper Tires Discoverer AT3 4S 265/50R20 at ThreePiece.us — free shipping on every order, Affirm financing available, and fast delivery nationwide.
What 265/50R20 means
In the size 265/50R20, 265 is the section width in millimeters (10.43 in), 50 is the aspect ratio — the sidewall stands 50% as tall as the tire is wide, or 132.5 mm (5.22 in) — R denotes radial construction, and 20 is the wheel diameter in inches. That works out to an overall diameter of about 30.43 inches, turning roughly 663 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 111 — a maximum load of 2,403 lbs per tire. The speed symbol T corresponds to a maximum sustained speed of 118 mph.
Specifications
| Size | 265/50R20XL |
| Tire Type | All Terrain |
| Service Description | 111T |
| Load Index | 111 |
| Speed Rating | T |
| Load Range | XL |
| Section Width (mm) | 265 |
| Aspect Ratio | 50 |
| Overall Diameter (in) | 30.51 |
| Tread Depth (/32") | 12.5 |
| Treadwear | 620 |
| Traction Grade | A |
| Temperature Grade | B |
| UTQG | 620AB |
| Warranty | 65K |
Frequently asked questions
What are the treadwear and warranty ratings on the Cooper Tires Discoverer AT3 4S?
This tire carries a treadwear grade of 620, traction grade A, temperature grade B under UTQG. The manufacturer's warranty is 65K.
What does 111T mean on the Cooper Tires Discoverer AT3 4S?
111T breaks down as load index 111 — rated for 2,403 lbs per tire — with a T speed rating, good for a maximum sustained 118 mph.
What kind of tire is the Cooper Tires Discoverer AT3 4S?
The Cooper Tires Discoverer AT3 4S in 265/50R20 is a all terrain tire.
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Shop all 265/50R20 tires, see every Cooper Tires Discoverer AT3 4S size, explore all terrain tires, or view all tires at ThreePiece.us.
- BRAND:
- Cooper Tires
- Model:
- COO Discoverer AT3 4S
- Size:
- 265/50R20XL
- Aspect Ratio:
- 50
- Load Index:
- 111
- Load Range:
- XL
- Section Width:
- 265
- Service Description:
- 111T
- Speed Index:
- T
- Temperature:
- B
- Tire Rim Diameter:
- 30.51
- Tire Type:
- All Terrain
- Traction:
- A
- Tread Wear:
- 620
- Tread Depth:
- 12.5
- UQTG:
- 620AB
- Warranty:
- 65K
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