• 22.2mm clamp size
• Shimano fittings
The shifters are not included, but are readily available in 8 through 11-speed versions, and many have an option for friction-shifting.
Thumbies bring back the thumb shifting of old, and Paul think it makes shifting more precise and smoother.
Thumbies have a hinged clamp for an easy installation and fit handlebars with a diameter of 22.2mm. The clamp is raised up to give clearance for hydraulic brake levers.
Paul Components currently make Thumbies to work with Shimano shifters only. It has a shifter mounting boss that fits Shimano bar end shifter and some Shimano downtube shifters.












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