Discoverer Stronghold AT

About the Cooper Discoverer Stronghold AT

All-Weather All-Terrain Passenger Light Truck tire.

Features

* Strong shoulder design features such as scooped tread edges, wide tread grooves and sidewall hook pattern* Wide open grooves in the tread* Cooper's 3D sipe technology* Textured edges on the shoulders* Strategically designed tread lugs* Ledges between the lugs* M+S Rated* Carries the Three-Peak Mountain Snowflake (3PMSF) symbol* 60,000 Mile/96,000 km Limited Treadwear Warranty* 45-Day Satisfaction Guarantee

Benefits

* Provide grip and traction for the life of the tire* Grab and release soft surfaces* Helps to provide stability* Grab into the snow to help provide traction in harsh winter conditions* Help to resist cracking, tearing and rounding of the tread* Help prevent stones getting stuck in the tread* Meets the required performance criteria for Use in Severe Snow Conditions

Understanding the LT275/55R20 E size

In the size code 275/55R20, 275 is the section width in millimetres (about 10.8"). 55 is the aspect ratio — the sidewall height is 55% of the width, or roughly 151.3 mm. R20 means radial construction on a 20-inch wheel, giving an approximate overall diameter of 31.9".

The load index 120 means each tire supports up to 3,086 lbs — about 12,344 lbs across a full set of four. The speed symbol S certifies the tire to 112 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 Stronghold AT is built for

The Cooper Discoverer Stronghold 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.

Price and value

At $239.99 per tire, a full set of four costs $959.96. That is about 18% above the average of the 156 tires we stock in this size, reflecting its position in the range. Backed by a 60,000-mile treadwear warranty, that works out to roughly $16.00 per 1,000 miles across the set.