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The 22.2mm Thumbies fit mountain bike handlebars
Thumbies have a hinged clamp for an easy installation
They have a shifter mounting boss that fits Shimano bar end shifters and most Shimano downtube shifters
Machined in the USA of 6061 aluminum
Paul Components Thumbies turn bar-end shifters into flat-bar shifters.Features-The 22.2mm Thumbies fit mountain bike handlebars-Thumbies have a hinged clamp for an easy installation-They have a shifter mounting boss that fits bar end shifters and most downtube shifters-Machined in the USA of 6061 aluminum