sähköpyöriin

Sähköpyörä, also known as an e-bike, is a bicycle equipped with an electric motor used to assist propulsion. This motor can be engaged in various ways, typically either by pedaling (pedal-assist) or by a throttle. Pedal-assist systems detect when the rider is pedaling and provide a boost to make riding easier. Throttle-based systems, on the other hand, allow the rider to activate the motor without pedaling.

The primary purpose of an electric motor on a bicycle is to reduce the physical effort required for riding. This makes cycling more accessible to a wider range of people, including those with physical limitations, older adults, or individuals who need to travel longer distances or tackle steep hills. E-bikes can also be a practical alternative to cars for commuting, reducing traffic congestion and emissions.

There are several types of electric motors used in e-bikes, with mid-drive and hub motors being the most common. Mid-drive motors are integrated into the crankset, offering good torque and balance. Hub motors are located within the wheel hub, either front or rear, and are generally simpler in design.

The power of the electric motor is typically limited by regulations in many countries to ensure safety and maintain the classification of the vehicle as a bicycle. Batteries, usually lithium-ion, are rechargeable and provide the energy for the motor. The range of an e-bike depends on factors such as battery capacity, terrain, rider weight, and the level of assistance used.