RLB400 Closed shoulder drive-position tire,Deep Tread The Double Coin RLB400 drive-position tire features an extra deep tread and solid shoulder ribs for superior handling and maximum traction. Its multi-extruded tread package promotes cooler running, which preserves casing integrity and promotes multiple retreads. - Closed shoulder tread design provides even wear while maintaining excellent traction - Extra deep 30/32" tread with stone drilling protectors promotes long original mileage - Heavy-duty casing for strength, stability, toughness and multiple retreads