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Cooper
Cooper Discoverer A/T3 275/60R20 115T - 90000020915
Cooper Discoverer A/T3 275/60R20 115T - 90000020915
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Shop the Cooper Discoverer A/T3 275/60R20 at ThreePiece.us — free shipping on every order, Affirm financing available, and fast delivery nationwide.
What 275/60R20 means
In the size 275/60R20, 275 is the section width in millimeters (10.83 in), 60 is the aspect ratio — the sidewall stands 60% as tall as the tire is wide, or 165.0 mm (6.50 in) — R denotes radial construction, and 20 is the wheel diameter in inches. That works out to an overall diameter of about 32.99 inches, turning roughly 611 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 115 — a maximum load of 2,679 lbs per tire. The speed symbol T corresponds to a maximum sustained speed of 118 mph.
Specifications
| Size | 275/60R20 |
| Tire Type | All Season |
| Service Description | 115T |
| Load Index | 115 |
| Speed Rating | T |
| Load Range | SL |
| Section Width (mm) | 275 |
| Aspect Ratio | 60 |
| Overall Diameter (in) | 33.03 |
| Tread Depth (/32") | 12.5 |
| Treadwear | 560 |
| Traction Grade | A |
| Temperature Grade | B |
| UTQG | 560AB |
| Warranty | 60K |
Frequently asked questions
What are the treadwear and warranty ratings on the Cooper Discoverer A/T3?
This tire carries a treadwear grade of 560, traction grade A, temperature grade B under UTQG. The manufacturer's warranty is 60K.
What does 115T mean on the Cooper Discoverer A/T3?
115T breaks down as load index 115 — rated for 2,679 lbs per tire — with a T speed rating, good for a maximum sustained 118 mph.
What kind of tire is the Cooper Discoverer A/T3?
The Cooper Discoverer A/T3 in 275/60R20 is a all season tire.
Keep shopping
Shop all 275/60R20 tires, browse Cooper tires, or view all tires at ThreePiece.us.
- Brand:
- Cooper
- Model:
- Discoverer A/T3
- Size:
- 275/60R20
- Aspect Ratio:
- 60
- Load Index:
- 115
- Load Range:
- SL
- Section Width:
- 275
- Service Description:
- 115T
- Speed Index:
- T
- Temperature:
- B
- Tire Rim Diameter:
- 33.03
- Tire Type:
- All Season
- Traction:
- A
- Tread Wear:
- 560
- Tread Depth:
- 12.5
- UQTG:
- 560AB
- Warranty:
- 60K
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