Discoverer Road + Trail AT

About the Cooper Discoverer Road + Trail AT

All-Weather All-Terrain Passenger SUV Tire.

Features

* Durable tread* Improved interlocking tread lugs* Continuous tread pattern extends over 50% further down the sidewall than the predecessor and angled design is twice as thick* Durable internal construction* Interlocking tread blocks* Road Glide technology* Connected center tread lugs* Carries the Three-Peak Mountain Snowflake (3PMSF) symbol* 65,000 Mile/105,000 Kilometer Limited Treadwear Warranty* 45-Day Test Drive* UTQG 620 A B

Benefits

* Helps resist cutting, cracking and tearing that occurs on tough trails* Increase all-season performance to help you feel confident in wet and dry conditions* Will help you experience a smoother, quieter ride* Provides more area to grip soft or uneven surfaces* Helps the tire keep its shape when driving over rough surfaces, for more even wear across the tread* Help provide the grip and consistent control you need on uneven terrain* Improves the fit between the tire and wheel to encourage a smoother, more comfortable ride* Help provide stability and traction on snowy surfaces* Meets the required performance criteria for Use in Severe Snow Conditions

Understanding the 255/75R17 size

In the size code 255/75R17, 255 is the section width in millimetres (about 10"). 75 is the aspect ratio — the sidewall height is 75% of the width, or roughly 191.3 mm. R17 means radial construction on a 17-inch wheel, giving an approximate overall diameter of 32.1".

The load index 115 means each tire supports up to 2,679 lbs — about 10,716 lbs across a full set of four. The speed symbol T certifies the tire to 118 mph under its rated load. Always match or exceed the load index and speed rating listed on your vehicle's door-jamb placard.

What the Cooper Discoverer Road + Trail AT is built for

The Cooper Discoverer Road + Trail AT is an all-weather tire — a year-round option certified for severe snow service, so it can stay on the vehicle through winter. It carries the three-peak mountain snowflake (3PMSF) symbol, meaning it passed a standardised severe-snow traction test. It is classified for all-terrain (a/t) use.

Tread life and grip ratings

This tire carries a UTQG rating of 620 A B. The treadwear grade of 620 is a relative durability score — a grade of 200 is expected to last roughly twice as long as a grade of 100 under the same controlled test. Traction grade A measures straight-line wet stopping grip (AA is highest, then A, B and C). Temperature grade B reflects heat resistance at sustained speed (A is highest).

Price and value

At $183.74 per tire, a full set of four costs $734.96. That is about 10% below the average price of the 39 tires we stock in this size. Backed by a 65,000-mile treadwear warranty, that works out to roughly $11.31 per 1,000 miles across the set.