A system for powering a bicycle using a motorized roller pressed against the tire provides a simple, often low-cost, method of propulsion. Such systems typically consist of a small gasoline engine or electric motor driving a friction wheel, a mounting framework, and necessary hardware. The motorized roller transmits power by creating frictional contact with the bicycle’s tire, effectively turning the tire and propelling the bicycle forward.
This type of motorized assistance offers a practical approach to enhancing bicycle mobility, particularly for hill climbing or extended journeys. Its relative simplicity makes installation generally less complex than integrated mid-drive or hub motor systems. Historically, friction drives were a popular method of motorizing bicycles, predating more sophisticated electric and internal combustion engine integrations. This technology provided an accessible entry point to motorized transport for a broader audience.