Thumbies
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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 most 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. Two sizes are available to fit handlebars with a diameter of 26.0mm or 22.2mm. 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 26.0mm version is 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 Thumbie are available, for use with Shimano or SRAM shifters. The Shimano version has a shifter mounting boss that fits Shimano bar end shifter and some downtube shifter. The SRAM version has a mounting boss that is compatible with SRAM TT bar end shifters. When paired with Silver Shifter Adapters, Shimano style Thumbies work with the ratcheting Silver Shifters available from Rivendell. These shifters work just like the old Suntour Power Ratchet shifters, but better. Thumbies are available in left and right pairs for front and rear shifters, or as single front or rear shifter mounts. A single right Thumbie for a rear shifter works great on a bike with a simple 1x10 drivetrain. Tech Info:
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