2012 Triathlete Buyer’s Guide: Running Shoes

Adidas adiZero adios 2 $115

Lightness alone does not make a great racing flat—especially if it’s designed to be used in race distances up to the marathon. Comfort and stability are also important. The AdiZero Adios 2 combines all of these virtues plus a trampoline-like responsiveness in a flat that can legitimately claim to be the world’s fastest—having carried Geoffrey Mutai to a 2:03:02 marathon in Boston last year. Its sturdy sole also outlasts nearly every other racing flat. Adidas.com