Mickey Thompson Baja STZ All-Terrain Radial Tire - 31X10.50R15LT 109R 50,000 Mile Tread Warranty Variable density nylon overwraps for improved uniformity and ride Strategically placed and shaped siping to promote long wear and improve traction on wet or icy surfaces Serrated tie bars and shoulder scallops for improved tread element stability and off-road traction Multi-draft lug angles improve self cleaning, increase lug stability, and reduce stone retention