Firestone Transforce AT Radial Tire - 245/75R17 121R Advanced High Modulus Tread Compound and Polyester and Steel Construction - Helps to prevent damage and promotes long wear Computer-Designed Shape and Body - Contributes to ride comfort Circumferential Grooves - Promotes extra traction in wet conditions Continuous Shoulder Ribs - Helps increase tread life Advanced High Modulus Tread Compound and Polyester and Steel Construction - Helps to prevent damage and promotes long wear Computer-Designed Shape and Body - Contributes to ride comfort Circumferential Grooves - Promotes extra traction in wet conditions Continuous Shoulder Ribs - Helps increase tread life