Write a Review
Cooper
Cooper Discoverer Road Trail AT 225/70R15 100T - 171264050
Cooper Discoverer Road Trail AT 225/70R15 100T - 171264050
📧 Get Fitment Help
Verify parts fit & get product recommendations
Lease-to-own for as low as
/week
Get Started
Guaranteed to Fit — confirm your size with the fitment checker on this page
Price Match Guarantee Learn More
Free Mount & Balance
Free Shipping
OUT OF STOCK 
📧 Get Fitment Help
Verify parts fit & get product recommendations
The Cooper Discoverer Road Trail AT in 225/70R15 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 225/70R15 means
In the size 225/70R15, 225 is the section width in millimeters (8.86 in), 70 is the aspect ratio — the sidewall stands 70% as tall as the tire is wide, or 157.5 mm (6.20 in) — R denotes radial construction, and 15 is the wheel diameter in inches. That works out to an overall diameter of about 27.40 inches, turning roughly 736 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 100 — a maximum load of 1,764 lbs per tire. The speed symbol T corresponds to a maximum sustained speed of 118 mph.
Specifications
| Size | 225/70R15 |
| Tire Type | All Season |
| Service Description | 100T |
| Load Index | 100 |
| Speed Rating | T |
| Section Width (mm) | 225 |
| Aspect Ratio | 70 |
| Overall Diameter (in) | 27.44 |
| Tread Depth (/32") | 13 |
| Treadwear | 620 |
| Traction Grade | A |
| Temperature Grade | B |
| UTQG | 620AB |
| Warranty | 65K |
Frequently asked questions
What does 100T mean on the Cooper Discoverer Road Trail AT?
100T breaks down as load index 100 — rated for 1,764 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 225/70R15 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
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:
- 225/70R15
- Aspect Ratio:
- 70
- Load Index:
- 100
- Section Width:
- 225
- Service Description:
- 100T
- Speed Index:
- T
- Temperature:
- B
- Tire Rim Diameter:
- 27.44
- Tire Type:
- All Season
- Traction:
- A
- Tread Wear:
- 620
- Tread Depth:
- 13
- UQTG:
- 620AB
- Warranty:
- 65K
PRODUCT REVIEWS (0)
Overall Rankings
Have you tried this product?
WRITE A REVIEWNo reviews for this product yet. Be the first to write a review!
Write a Review