The Cooper Discoverer Stronghold AT lives up to its name, providing a strong hold with 3D sipe technology in the shoulders that help provide stability in cornering. With wide open grooves in the tread, the Cooper Discoverer Stronghold AT offers solid traction in dirt, gravel and other soft surfaces. The tire also carries the Three-Peak Mountain Snowflake Designation (3PMS), indicating that it meets a snow traction standard set by Federal Motor Vehicle Safety Standards."The Cooper® Discoverer Stronghold AT i ...