Each Ultimax UA belt is designed for its specific application. Specially formulated compounds create a durable and dependable belt that provides optimum performance. Ultimax UA stands on the shoulders of giants in that its development starts with the best-selling line of snowmobile belts belts that excel on 150\ hp sleds. From there, each belt is specially designed for its application. From materials to dimensions to cog design, Ultimax will take your ride beyond factory stock capabilities in performance and reliability.