The VAS - Vibration Absorbing Stem - smooths out the ride for dirt and rough pavement applications with drop handlebars. It features a Polyurethane elastomer with 360° handlebar isolation and a keyed clamping interface. Three elastomer options are included Light Grey (70A) “Comfort” Dark Grey (80A) “Sport” Dark Black (90A) “Race” NOTE: NOT for use with handlebars with a cable routing hole in central clamping region. The VAS Stem is compatible only with handlebars that have a 31.8mm handlebar clamp diameter and are narrower than 460mm.