AVENUE CRUISERS CO.
Servo
Automatic shifting for your acoustic bike
Kickstarter backer all-in$999.95
Planned store price$1,099.95
Ships after Kickstarter backer fulfillment (estimated Q4 2027)
Launching on Kickstarter — Coming in November
It shifts before you stop. A small servo module mounts at your rear derailleur, watches your cadence and wheel speed, and drops you into the right gear before you stop — so you always pull away easy. It never shifts while you're stationary. No display, no menus, no app to fuss with — just ride.
- Servo-driven stepped cable spool: 2.9 mm of cable pull per step, 6 steps, 17.4 mm total — exactly what moves a derailleur across the cassette
- Microcontroller reads cadence, wheel speed, and motion, and decides gears on the bike — no cloud, no phone, no account
- Preemptive downshift: the system sees the stop coming and shifts while the chain is still moving, because a derailleur can't shift standing still
- Fits standard cable-actuated rear derailleurs. Internal-gear hubs and electronic drivetrains (Di2, eTap) are not compatible
Rider feedback
Help us improve automatic shifting. Tell us how you ride and what frustrates you about shifting.