These easily transform bar-end (aka barcon or TT) shifters into thumb shifters. The shifters are not included, but are readily available in 8 through 12-speed, Shimano and SRAM versions, and many have an option for friction-shifting. The Shimano version will work on any indexed Shimano bar-end shifter going all the way back to 6 speed! The Microshift version's mounts are compatible with the Microshift Alfine/Nexus 8-speed shifter (part #BS-N08). Be sure you are using the MTB Microshift (or Gevenalle) model, as the Road version is smaller and will not fit properly. The Shimano version has a shifter mounting boss that fits Shimano bar end shifters and most Shimano downtube shifters, so long as they mount to a flat, not curved, shifter boss. The Microshift version clamp is raised up to give clearance for hydraulic brake levers. They have a shifter mounting boss that fits MICROSHIFT and Gevenalle mountain shifters.
