Diadora was founded in the Italian town of Caerano in 1948. This small district was known in those years for being a real testing laboratory where skilled craftsmen made custom hiking boots for people throughout the region. Diadora has come a long way since then, but its ethos of being distinguished through high quality, attention to detail, and the use of innovative materials hasn't wavered, remaining the same today as it was when it started out more than 60 years ago. Today, in addition to specializing in the production of footwear for tennis and soccer players, Diadora devotes itself to crafting some of the most technically advanced cycling shoes in the world. Just take a look at images of 2011 Tour winner, Cadel Evans, and you'll see that he was, and still is, relying on his Diadoras to propel him to victory. The Diadora Vortex Racer Shoes sit just below the its marquee Jet Racer. One of the main differences between the models comes down to the closure system, which is often a matter of individual rider preference rather than a performance issue. Simply put, the Jet Racer received two hook-and-loop straps with a ratcheting-buckle top closure, whereas the Vortex Racer utilizes a single hook-and-loop forefoot strap paired with a Boa closure. In case you hadn't noticed, Boa is highly selective as to who it licenses its products to, making the Vortex Racer the perfect shoe choice for riders that need the personalized comfort and support that only this system is able provide. Boa incorporates a steel wire, nylon guides, and a mechanical rotor in order to control the retention at the top of the tongue. And with a simple and quick turn of the dial, your retention is made secure and unwavering, providing the most even, forgiving, simple-to-use, and precise retention on the market. Moving down from the closure system, Diadora built the Vortex Racer shoes around its Shape Race last.