IRD Thumb Shifters, Power Ratchet

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Product Overview

I remember the XT top mount thumb shifters on my Bridgestone MB-1 to be the most elegant and easy to use solution for shifting ever invented. They could as well be called knuckle shifters because just a slight twist of the hand with the knuckle of the index finger on the lever worked too. Other's obviously think the same since Paul Component Manufacturing makes the Thumbie, a mount for using bar end shifters as top mount shifters. IRD has taken it a step further with the XC-Pro Thumb Shifters and, now, these . Retro friction power rachet top-mount thumb shifters.

Shims are included for use with 22.2 mm diameter bars like the Nitto Albatross, Soma Oxford, and Nitto all-Rounder bars. Will work on road bars as well. So get the Paul Thumbies for 72 bucks plus Shimano bar end shifters for 80 to 90 bucks, or get these for 100 bucks.


  • Retro style friction thumb shifters
  • Fits 23.8 mm bar (most drop style road bars), and 22.2mm with shim
  • Aluminum levers
  • Hinged CNC'd aluminum clamp for easy installation
  • Works for 5 through 10 speed drivetrains

Warranty Information

One year against defects in material and/or workmanship.