If you spend as much time racing as training, you want the lightest, stiffest bike and components as possible. But, did it ever occur to you that if you're wearing the wrong shoes you're losing valuable power? The Diadora Vortex Pro is not the lightest shoe on the market, but it does feature an ultra-stiff sole for optimal power transfer.
To begin with, the Vortex Pro is constructed using the Pro Road outsole. This is a full 3k carbon fiber sole with NET breathing technology. What this means is that the soles are constructed of a synthetic mesh and a breathable and impermeable membrane which increases the soles' transpiration capacity. This prevents moisture, mud, and other external elements from entering the shoes. In other words, your feet stay dry. Working in conjunction with the outsole is an EVA molded insole. Its waterproof materials and perforated construction also keep your feet dry, even in extreme weather conditions. That said, the shoe itself is not waterproof. You'll want to wear a shoe cover for downpours and snowy conditions.
Featuring a Race Fit, the uppers of the Vortex Pro are designed with Diadora's Suprell-Tech, Morpho AM Cage technology. This design keeps the shoe tight against your foot, without constricting circulation. Additionally, a molded heel support and a removable pad keep your heels from slipping when you pedal. The anti-slip heel pad was constructed of Duratech rubber for its grip as well as abrasion resistant properties. It is affixed with a single screw, and if desired, may be removed by lifting the insole. These features combine with the carbon sole to create a shoe that fits like a glove. Minimizing slippage and gaping, the Vortex Pro puts all the power where it belongs -- in the pedals.
Diadora's Vortex would not be complete without a mention of its closure system. Using the BOA 2 Technology that has become popular in the last few years, these shoes are easily donned and tightened with a simple twist of the wrist. The cable system tightens against your foot and a slightly padded tongue prevents welts.
The Diadora Vortex are compatible with 3-hole road cleats and weigh 269 grams. They are available in sizes 37.0, whole and half sizes 38.0 to 46.0, and size 47 and in the colors: White/black/red and Black/yellow fluo/white.