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Wireless Thumb Shifters

With a recent SRAM ecosystem update, Blips can now operate without a primary controller—opening up new possibilities for custom integration. However, SRAM Blips aren’t designed with mountain bike handlebars in mind, especially older ones.

After buying a ‘90s Cannondale MTB, I designed and 3D printed a custom thumb shifter that fits cleanly between the brake lever and grip. The form is minimal, ergonomic for short thumb presses, and blends seamlessly with the bar. Most people don’t even realize it’s there.

Internally, the Blip is stripped down and soldered to a connector inside the shifter housing, allowing for easy maintenance and battery replacement—something SRAM doesn’t officially support, as the units are considered disposable.

Full Specs build specs:

Frame: Cannondale M300 SE
Wheels: Sun Rims Rhyno Lite
Hubs: Velo Orange Disc Hubs
Handlebar: Simworks Mowmow
Brakes: Avid Single Digit 7 V Brakes
Seat: Fizic Antares R1
RD: SRAM Rival XPLR
Crankset: SRAM Rival 42t
Cassette: SRAM XPLR PG-1231 Cassette

Lookout for files and instructions coming soon to build your own.