If speed kills, then the K-Swiss Speedtrac makes you feel downright lethal. Lightweight shoe enthusiasts should definitely consider this one when looking for their next pair.

From top left: Men's Wilson Tour Ikon; Women's New Balance 1005; Men's Babolat SFX Ergo-Motion; Men's K-Swiss Tubes Monfils ... consider the shape of your foot. Shoes that fit poorly can hinder ...