Thumbie Shifter Mounts
Our Thumbies are the original upright handlebar mount. They easily transform bar end (aka barcon) shifters into thumb shifters. These shifters are not included, but are readily available in 8, 9 and 10-speed versions, and many have an option for friction-shifting.
Thumbies bring back the thumb shifting of old, and we think it makes shifting more precise and smoother than ever before. These feel much better in our opinion than trigger or twist shifters.
Thumbies have a hinged clamp for an easy installation. Three sizes are available to fit handlebars with a diameter of 22.2mm, 26.0mm or 31.8mm. On road bike bars this is the thicker section of the bar where the stem clamps on. On city and mountain bike bars the grip section is usually 22.2mm (7/8") in diameter.
The clamps of the 26.0 and 31.8mm versions are designed to work next to inline brake levers like our Cross Lever, while the 22.2 clamp is raised up to give clearance for hydraulic brake levers.
Two different kinds of Thumbies are available: Shimano or SRAM shifters.
The Shimano version has a shifter mounting boss that fits Shimano bar end shifter and some Shimanao downtube shifters.
The SRAM version has a mounting boss that is compatible with SRAM TT alloy bar end shifters, but will not work with R2C shifters.