The iconic design that gave birth to our first cycling shoes over 60 years ago meets modern materials to create our lightest racing shoes. Designed to retain all support and strength, the Sixty offers the ultimate fit in a pair of racing shoes for cycling. The Sidi Tecno-4 Push System has a single rotor to reduce the shoe's weight and guarantees the precision of a micrometric closure. The Adjustable Heel Retention device reinforces the top of the heel cup and improves the fit by closing the back of the shoe securely around the rider’s heel. The heel retention device tightens the top of the heel cup so that the heel is secured during steep climbs and sprints, each side of the heel can be adjusted independently for a perfect fit. The Vent Carbon Sole is handmade exclusively of carbon fiber in a weave pattern oriented at opposing angles that maximize stiffness while allowing for a small degree of controlled flex in the toe area. The Vent Carbon Sole features a standard 3-hole drilling pattern, printed 10 mm lateral and fore/aft cleat alignment scale for easy cleat alignment and replacement. The key benefits of the Vent Carbon Sole are not only superior power transfer because of its light weight and stiffness, but also warm weather comfort. For walkability, Sidi cycling shoes include a replaceable polyurethane heel pad.