Nexen Roadian AT Pro RA8 Radial Tire - 31X10.50R15LT 109S Dual block design prevents gravel from being caught and damage caused from external impact Micro groove design enhances driving performance and traction on wet or snow covered roads Staggered center rib and increased block strength provide greater biting for off-road use Wide shoulder block design and enhanced block stiffness increase stability and durability, even on tough roads