Michelin Primacy A/S 245/55R19 103H BSW Michelin Primacy All Season A/S Tire. The Michelin Primacy A/S is a Grand Touring All-Season tire developed for the drivers of family sedans, coupes, crossovers and SUVs looking to maximize ride and noise comfort and maintain year-round traction The Primacy A/S is designed to deliver a premium driving experience combined with all-season capability, even in light snow The five-rib pattern of the Primacy A/S’s asymmetric tread design is tuned to provide the refined, quiet ride expected of a luxury touring tire Wide outboard shoulder blocks aid dry handling and lateral grip and sweeping grooves help evacuate water for hydroplaning resistance Zigzag sipes located in the center and inboard ribs, as well as the inside shoulder, provide traction in snow and on ice. The internal construction of the Primacy A/S consists of a two-ply, polyester cord casing that promotes ride comfort, and two steel belts stabilize the tread. A single, polyamide reinforcement aids handling and delivers high-speed capability