4" Rise Chrome Billet Spike Risers for Harley-Davidson Handlebars Chrome Universal Handlebar 4" Spike Risers Custom Spike style with hidden clamp bolts. Eliminate the handlebar top clamp with precision machined billet risers.For 1" handlebars. Mount with coarse thread riser bolts. 4" Rise. 7" overall height. Fits all Harley-Davidson models and any custom application. Mounting bolts included