Bonnell 775 MX Upgrade Rear Wheel | 5 Speed Transmission Electronic Shifting Upgrade Kit

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. Built by Demand 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. Specifications Spec Detail Application Bonnell 775 MX — single-speed to 5-speed conversion Drivetrain 5-speed, electronic wireless shifting Shifter / Derailleur OX custom-programmed 5-speed, wireless, strong clutch for chain retention Cassette CYC 5-speed CNC, high-torque rated Chain Shimano 9-speed heavy-duty e-bike chain (anti-corrosion) Rear Wheel Hand-built WTB i35 rim, HPC custom 148×12 hub with steel driver Built In-House Spokes Sapim 12-gauge, cold-rolled and cut in house Hub Standard 148×12 Boost, HPC custom with steel driver Recommended Installation Experienced e-bike mechanic or HPC service shop What's Included Hand-Built WTB i35 Rear Wheel 12-gauge Sapim spokes (cold-rolled and cut in house), HPC custom 148×12 hub with steel driver. Proudly built in our Simi Valley shop — stronger and more durable than any off-the-shelf wheel. CYC 5-Speed CNC Cassette High-quality, incredibly strong. Designed specifically for the torque output of the CYC mid-drive system. Shimano Heavy-Duty 9-Speed E-Bike Chain Anti-corrosion treatment, reduced chain stretch under load, and built specifically for the demands of e-bike drivetrains. OX Custom-Programmed 5-Speed Wireless Shifter & Derailleur Custom-programmed for 5-speed operation, strong clutch for excellent chain retention, fully wireless — no messy cables to route or tune. The HPC Difference Wheels hand-built in our Simi Valley warehouse. Spokes we cold-roll and cut ourselves. Real US customer service from a team that rides what they sell. Questions about fitment or installation on your specific 775 MX? Call us — we've installed this kit and we're happy to walk you through it.