Torque Sensor, incuding bottom bracket for the Super73 S Series & R Series
The torque sensor sits between the pedals and controls the amount of power is required from the motor. These sensors detect how much pressure is applied to your pedals and gives you an optimum amount of power for when you need it.
In other words, these torque sensors give you a smoother acceleration than the cheaper cadence sensors that are found on all the cheap fat tyre ebikes.
S Series in Australia is the S2-E and S Adventure eBikes.
R Series in Australia is the RX-E and R Adventure eBikes.