BFGoodrich All-Terrain T/A KO All-Terrain Radial Tire - LT315/70R17/D 121R Dual-compound tread and ShoulderLock technology with 40% wider shoulder grooves provide increased traction and control in aired-down driving situations. Aggressive, high-void all-terrain tread design with a choice of distinctive raised white letters or black outline sidewall styling. Three-ply polyester carcass delivers stiffer tread area for more precise steering response, better cornering control, excellent puncture and exceptional bruise resistance. Built to improve stress distribution, tread life and resistance to irregular wear.