Blendr works with this simple formula: Stem + Base + Mount. Add accessory.Bases for use with the XXX Integrated Road Handlebar/StemAdd any accessory mount (sold separately) for an elegant, integrated lookBlendr works with this simple formula: Stem + Base + Mount. Add accessory.Please use the Bontrager/Trek Blendr compatability flowchart to ensure your selection of stem, base and mount are compatible.