The Shimano S-Phyre is a high-performing competition shoe for the serious road racer. This light and stiff shoe comes in at just 243 grams in a size 42 shoe. Shimano rates the stiffness of the outsole as a 12 which is the highest level on their scale. This outsole is made of light and hollow synthetic leather microfiber. With a carbon sole and mid-sole, you will get a high-performing shoe that resists stress for a comfortable ride.