
Mid-drives use a system of complex gears and a torque sensor for the motor to provide electric assist through to the pedal cranks
Mid-drives are electric-assist motors on e-bikes that drive through the pedal cranks (usually on turning the cranks – so-called pedelec power). They have become hugely popular in recent years as the technology has become more powerful, lighter, and more efficient, with every year bringing announcements of new mid-drive developments.
They are frequently used by some of the best electric bikes.

A typical mid-drive motor design that powers the bike along via the pedal cranks. Mid-drives are usually activated on pedalling with power both proportional to your pedal effort and dependent on what power level you have the motor set at. A few designs include an auxiliary throttle control in addition to ‘pedelec’ control.
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