Firestone Destination A/T All-Season Radial Tire - 315/70R17 121R CO-CS (Computer Optimized Component System) - Maximizes performance by optimizing the appropriate combination of tread design, casing shape, materials, and construction O-Bead - Improves uniformity and ride comfort through use of a single continuous strand of cable in the bead construction LL Carbon (Long Link) - Helps improve tread wear and resist cracking, chipping and tearing through the use of a special long length carbon structure Noise Reduction - Produces noise-canceling sound waves to significantly reduce tire noise on road surfaces CO-CS (Computer Optimized Component System) - Maximizes performance by optimizing the appropriate combination of tread design, casing shape, materials, and construction O-Bead - Improves uniformity and ride comfort through use of a single continuous strand of cable in the bead construction LL Carbon (Long Link) - Helps improve tread wear and resist cracking, chipping and tearing through the use of a special long length carbon structure Noise Reduction - Produces noise-canceling sound waves to significantly reduce tire noise on road surfaces