The new 60s were inspired by Zipp"s proven 58mm hoops that have claimed countless victories around the world. Zipp took its tried-and-tested aerodynamic carbon technology developed with its 303 and 404 wheelsets, and it combined a new hub design and predictable aluminum braking surface. The result is a durable, highly versatile carbon clincher available at a reasonable price. It"s the perfect wheelset for racing, training, and for those who just want a solid aerodynamic carbon wheel at a good price. With a construction that places an overall emphasis on durability, the 60 ensures that you"ll spend more time out riding and less time worrying about your wheels. The new wheels were designed with Zipp"s proven aerodynamic principles, using what Zipp calls a "hybrid toroidal" rim. It uses its Multi-Material Co-Molding process that permanently fuses a sub-200-gram aluminum hoop to a dimpled carbon structure that acts as a leaf spring for road vibration and impacts. The next step in the process is the implementation of VCLC, which involves the insertion of a visco-elastic material between carbon laminates in the rim, which delivers a ten percent reduction in road vibration. When it came to carbon resin, Zipp faced obstacles in relation to applied heat. It found that clincher rims handle all of the air pressure along with the tire, resulting in catastrophic failure when over-heated. Part of the solution came from the development of the Firecrest Clincher rim shape, and the other came out of an exclusive deal with a Formula One carbon resin manufacturer. Together, they worked out a new resin that improves heat dissipation enough to pass European safety testing. Like Zipp"s other wider-is-better wheel platforms, the familiar 58mm deep rim profile incorporates a relatively wide 23.5mm rim bed for stability, cornering grip, and overall ride comfort. At the heart of the wheelset is its new hub design, which is 10- and 11-speed compatible.