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Cooper Tires
Cooper Tires COO Discoverer AT3 XLT LT315/70R17/10
Cooper Tires COO Discoverer AT3 XLT LT315/70R17/10
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Looking for a 315/70R17 all terrain tire? The Cooper Tires Discoverer AT3 XLT is available now at ThreePiece.us with free shipping on every order and Affirm financing at checkout.
What 315/70R17 means
In the size 315/70R17, 315 is the section width in millimeters (12.40 in), 70 is the aspect ratio — the sidewall stands 70% as tall as the tire is wide, or 220.5 mm (8.68 in) — R denotes radial construction, and 17 is the wheel diameter in inches. That works out to an overall diameter of about 34.36 inches, turning roughly 587 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 121 — a maximum load of 3,197 lbs per tire, or 118 (2,910 lbs) per tire when mounted as duals. The speed symbol S corresponds to a maximum sustained speed of 112 mph.
Load Range E corresponds to a 10-ply rating.
Specifications
| Size | LT315/70R17/10 |
| Tire Type | All Terrain |
| Service Description | 121/118S |
| Load Index | 121/118 |
| Speed Rating | S |
| Load Range | E |
| Section Width (mm) | 315 |
| Aspect Ratio | 70 |
| Overall Diameter (in) | 34.33 |
| Tread Depth (/32") | 17 |
| Warranty | 60K |
Frequently asked questions
What kind of tire is the Cooper Tires Discoverer AT3 XLT?
The Cooper Tires Discoverer AT3 XLT in 315/70R17 is a all terrain tire.
What warranty does the Cooper Tires Discoverer AT3 XLT carry?
The manufacturer's warranty on this tire is 60K.
What does 121/118S mean on the Cooper Tires Discoverer AT3 XLT?
121/118S breaks down as load index 121 — rated for 3,197 lbs per tire (118, or 2,910 lbs, in dual fitment) — with an S speed rating, good for a maximum sustained 112 mph.
Keep shopping
Shop all 315/70R17 tires, see every Cooper Tires Discoverer AT3 XLT size, explore all terrain tires, or view all tires at ThreePiece.us.
- BRAND:
- Cooper Tires
- Model:
- COO Discoverer AT3 XLT
- Size:
- LT315/70R17/10
- Aspect Ratio:
- 70
- Load Index:
- 121/118
- Load Range:
- E
- Section Width:
- 315
- Service Description:
- 121/118S
- Speed Index:
- S
- Temperature:
- N/A
- Tire Rim Diameter:
- 34.33
- Tire Type:
- All Terrain
- Traction:
- N/A
- Tread Wear:
- N/A
- Tread Depth:
- 17
- UQTG:
- N/A
- Warranty:
- 60K
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