Paul Component Thumbie Microshift thumb shifting adaptor

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  • Microshift Thumbies

    Miss thumb shifters? Converting a drop bar bike to flat bars? Want to run a Shimano MTB drivetrain on your drop-bar bike, with shifting accessible right from the flats? These easily transform bar end (aka barcon or TT) shifters into thumb shifters. The shifters are not included, but are readily available in 8 through 11-speed versions, and many have an option for friction-shifting. These mounts are also compatible with the Microshift Alfine/Nexus 8-speed shifter (part #BS-N08). Be sure you are using the MTB Microshift (or Gevenalle) model, as the Road version is smaller and will not fit.

    Thumbies bring back the thumb shifting of old, and we think it makes shifting more precise and smoother. These feel much better in our opinion than trigger or twist shifters.

    Thumbies have a hinged clamp for an easy installation and fit handlebars with a diameter of 22.2mm or 31.8mm. 22.2mm is equivalent to 7/8 inches, and is the diameter of most mountain bike handlebars. Many flat bars, risers and city bars have this diameter. It is measured at the end of the bar where grips and brake levers attach. 31.8mm is most commonly used on modern road handlebars near where the stem clamps.
    The clamp is raised up to give clearance for hydraulic brake levers.

    They have a shifter mounting boss that fits MICROSHIFT and Gevenalle mountain and shifters.

    Technical Information
    • Material: 6061 Aluminum
    • Weight: 60g
    • Finish: Anodized or Polished
    • Anodized Color: Black or Silver
    • Clamp Size: 22.2mm or 31.8
    • Compatible Shifters: MICROSHIFT and GEVENALLE


    MICROSHIFT MTB or GEVENALLE MTB work great, but the Road version is too small and will not fit.
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    Installation GuideAttachment
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