Replacing its aging Pro4 tire series, Michelin's long awaited update to the aging monarch of its road tire line justifies its slow arrival with a host of gains over its predecessor. The Power line consists of four tires: Competition, Endurance, All Season, and Protection Plus, each constructed using a slightly different composition, with a different type of riding in mind. The Power All Season Clincher counts wet, slick roads as its preferred riding surface, so if a day of training through rain or fog is just another day for you, the All Season's focus on traction over low rolling resistance would fit your everyday routine well. Through its use of a new resin in the rubber Grip Compound that it uses to make the All Season, Michelin asserts that the tire performs 15% better on slippery surfaces than its preceding Pro4 wet condition tire. The resin does add some weight to the design, but when considering the material's ability to increase grip on messy, slippery surfaces at low temperatures, while offering gains in puncture resistance and longevity, the weight increase doesn't come close to overshadowing the benefits. While Grip Compound is responsible for most of the tire's 15% improvement in performance, according to Michelin, its benefits are spread 13% to 2% between a new tread profile, which boasts better side grip and a progressive tread void around the design.