A motorized system propels a bicycle forward by applying pressure against the wheel’s tire. Typically, this system comprises a small motor, battery, and controller, often mounted near the seat post or down tube. The motor drives a roller that makes contact with the tire, transmitting rotational force directly to the wheel for propulsion. This straightforward mechanism offers a relatively simple and cost-effective method for electrifying a conventional bicycle.
This type of electric bicycle conversion offers several advantages, including ease of installation and adaptability to various bicycle types. The absence of complex gearing or wheel hub modifications simplifies the conversion process, making it accessible to a wider range of users. Historically, this direct drive approach represented an early form of bicycle electrification, preceding more integrated systems. Its simplicity continues to be a key factor in its enduring popularity, particularly for those seeking a readily adaptable and less mechanically demanding conversion option.