Commercial drivers often need to frequent highways and job sites, so finding a set of tires that performs on any surface is very important. Consider the Smart Work DM09 from Hankook, whose directional tread pattern offers drivers better traction even in wet and muddy conditions. Tapered blocks and open shoulders work together to force out rocks and other debris to prevent damage, and the Smart Work DM09's rigid carcass cord allows drivers to carry heavy loads.