Extracting the motor controller from the base of the downtube required removing the crank-area skid plate. The controller is a compact 48V 18A to 22A peak sine-wave unit housed in an extruded aluminum sleeve. Thermal dissipation depends entirely on passive contact with the inner walls of the bike's frame tube. During our continuous high-draw bench testing, the controller casing reached 148°F (64.4°C) after fifteen minutes of sustained hill-simulation load.
The wiring harness represents a mixed bag of quality. The upper handlebar controls, throttle, LCD screen, and brake cut-off switches, use waterproof push-fit Higo-style connectors. Follow the main trunk down toward the bottom bracket, however, and the build quality downgrades. The junctions transition into standard, unsealed automotive-style JST plugs wrapped in shrink-tubing. If you ride through heavy rain or wash the frame down with a garden hose, water running down the seatpost and internal cable ports can collect in this bottom pocket, creating a short-circuit risk over time.
