Inspired by the top speeds of the track, the Endorphin Racer is an ultra lightweight, high-end elite racing shoe. This spike has been designed with all the elements to make responsive and high traction platform, aka the "track spike gone road". SPECS? Surface: Road, Track? Offset: 0mm? Heel Stack Height: 11mm? Forefoot Stack Height: 11mm? Weight: 3.1 oz