Toyo Open Country A/T II Radial Tire - 275/65R18 123S Aggressive shoulder tread blocks - Offer strong off road grip and give your truck or SUV a solid, tough appearance. Tie Bar between tread elements - Control wear characterstics and keep noise to a minimum. Extensive tread siping - delivers strong snow and sand traction - along with wet pavement performance. Exclusive shoulder design for the Open Country A/T II - Wrap around tread blocks extend well onto the sidwall giving a bold look, and protecting the sidewall from damage off road. Joinless nylon overlay - Ensures uniformity and structural integrity at higher speeds, and while off road.