EASY CONNECTION WITH THE BONTRAGER QUICK CONNECT LIGHT BRACKETS.The Bontrager Quick Connect Light Brackets provide quick installation on handlebars, seatposts, and more. These brackets fit all Ion headlights and Flare tail lights. FEATURESProvide quick installation on handlebars, seatposts, and moreFits all Ion headlights and Flare tail lightsRear strap includes 16 degree offset for optimized use on seatpostsRear strap works best with 27.2 - 31.6mm seatpostsFront strap works best with 22.2 - 35.0mm handlebars