5-Speed Transmission & Electronic Shifting Upgrade Kit
Unlock the Full Potential of Your Bonnell 775 MX.
Let's face it — a single speed with a mid-drive motor is not the best. To get the most out of a lightweight mid-drive, you need proper gearing and an adequate gear spread. This kit delivers exactly that: intuitive shifting, dramatically better efficiency, and noticeably longer range from the same battery. Please allow up to 10 days to build and ship your order.
For the last year, we've been inundated with customers requesting a viable transmission upgrade for the Bonnell 775 MX. So we delivered — adapting a similar setup proven on our own HPC Revolution MX. This kit includes everything you need to take your 775 MX from single-speed to a true 5-speed with electronic wireless shifting.
Proper Gear Spread
A real 5-speed range means you can climb harder, cruise faster, and let the motor stay in its efficient sweet spot — instead of compromising on a single ratio that does neither well.
Wireless Electronic Shifting
Custom-programmed OX 5-speed shifter and derailleur. No messy cables, no derailleur tuning headaches — just clean, precise, repeatable shifts at the press of a button.
Hand-Built In-House Wheel
WTB i35 rim, HPC custom 148×12 hub with steel driver, laced with Sapim 12-gauge spokes we cold-roll and cut ourselves. Stronger, truer, and more durable than any off-the-shelf wheel.
CYC 5-Speed CNC Cassette
High-strength CNC cassette engineered specifically for the torque output of the CYC mid-drive. Built to take the abuse a high-power mid-drive throws at it.
E-Bike Specific Chain
Shimano heavy-duty 9-speed e-bike chain — anti-corrosion treatment, reduced chain stretch under load, and engineered for the unique demands of e-bike drivetrains.
Better Efficiency & Range
Proper gearing keeps the motor in its optimal RPM band, which means less wasted energy. Same battery, more miles per charge, and a more intuitive ride from the first pedal stroke.
Proven Platform
Adapted From Our Revolution MX
This isn't an experimental package thrown together for the 775 MX. The 5-speed electronic-shift setup is a direct evolution of the drivetrain we've been refining and shipping on our own HPC Revolution MX — battle-tested, dialed in, and proven on the trail.
