Shifter Style:
Clamp Diameter:
Price: $74.00 Item #: 250BLACK
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Technical Information

6061 Aluminum
Anodized Color
Black or Silver
Clamp Size
22.2mm, 26.0mm, or 31.8mm

22.2mm is equivalent to �_ 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.

26.0mm is a common road handlebar size. It is measured in the center of the bars where the stem attaches.

31.8mm is the stem clamp diameter of oversize road and mountain handlebars.

Compatible Shifters
Shimano, SRAM or Campagnolo

Shimano bar end shifters work well with our Shimano style Thumbies. Many of their indexed downtube shifters will work as well, so long as they mount to a flat, not curved, shifter boss.

Our SRAM style Thumbies will work with SRAM TT bar end shifters.

Campagnolo bar end shifters will work with our Campagnolo style Thumbies.

Silver Shifters from Rivendell can be used with our Shimano style Thumbies with the addition of our Silver Shifter Adapters.

Additional Information

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.

Three different kinds of Thumbies are available, for use with Shimano, SRAM or Campagnolo 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. The Campagnolo version fits 10-speed Campagnolo bar end shifters and is only available with a 22.2mm clamp. It is not compatible with 11-speed Campagnolo shifters.

When paired with Silver Shifter Adapters, Shimano style Thumbies work with the excellent ratcheting Silver Shifters 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.

Spare Parts & Related Components
Mini Barrel Adjuster
A spring loaded barrel adjuster for a Cross Lever, E-Lever, Thumbie, MiniMoto or Funky Monkey.
Silver Shifter Adapter
An adapter to mount Silver Shifters on our Shimano compatible Thumbie shifter mounts.