The Cooper Discoverer STT Pro tire is a super high traction Mud tire with all-weather tire capabilities for heavy duty pickup trucks. It has a high load capacity and is built to be as rugged as possible. Engineered for durability, this tire features Cooper's Durable Tread technology for long life. The severe snow winter certification is your assurance of year round traction so no need to change out your tires for winter tires in most parts of Canada.