Fourth-generation Roctane all-terrain/rock radial: versatile 0.75"–1.0" multi-angle tread blocks (1.125" deep on the 18" sizes), staggered shoulder blocks, a smooth-riding 10-ply rated carcass with a wide, flat profile, and a super-deep rim guard. STI design, sold by High Lifter Tire & Wheel under HL MPNs since HL's 2022 lineup expansion.