Paul Component Engineering SRAM Shifter Mount Paul Thumbies let everyone mount shifters to flat bars. The Paul Component Engineering SRAM Shifter Mount sort of does the opposite - it lets you mount any SRAM under-bar trigger shifter to a 31.8 drop bar. Yeah, MTB drivetrain on drop bars, as in 10-42T spread with the shifters you already know, on a road/cross/gravel bike. Cool. And like all things Paul Componentry, this is made by real people in Chico, CA. Also cool. Paul Component Engineering SRAM Shifter Mount, 31.8mm Black Specifications: Material: 6061 Aluminum Clamp size: 31.8mm Finish: Anodized Weight: 22 grams