Inspired by the top speeds of the track, the Endorphin Racer is built for PRs weighing in at a feathery 3.1 oz.OVERVIEWAll the elements that make for an ultra lightweight spike combined with the responsive and high traction platformHigh-end elite racing shoeSPECSSurface: Road, TrackOffset: 0mmHeel Stack Height: 11mmForefoot Stack Height: 11mm