Mount your Doormate 2 to a variety of handlebar sizes with the easy to install mount with multisize adapters.  Three different rubber adapter sizes from 7/8", 1" & 1/-1/8"(22.2mm, 25.4mm & 28.6mm).  The stock clamp with no adapters is 1-3/8"(34.9mm) in size for any oversize diameter handlebar.