LT255/85R16 Cooper Discoverer S/T Maxx All Terrain 123/120QCooper Discoverer S T Maxx LT255 85R16 123 120Q E OVERVIEW The Discoverer S T Maxx from Cooper is a commercial grade light truck tire that's equally at home on rough gravel, mud, dirt, sand, and snow or on the pavement. The Discoverer S T Maxx utilizes a damage resistant rubber formulation that's molded into a symmetric 5 rib all terrain design and pre drilled for easy installation of studs (where permitted) for extra traction in extreme winter