Electric bike in USA

In 2009, there were an estimated 200,000 e-bikes in the United States. In 2012, they became increasingly popular in New York as a delivery tool.

In 2012, two e-bike advocates completed the first 4,000-mile (6,400-kilometer) cross-continental e-bike tour from New York to San Francisco to promote e-bikes in major U.S. cities. Standard bikes modified with kits. Typically, the kit includes motors (most of which are hub motors built into the front or rear wheels), speed controllers, throttles (usually torque grips or thumb throttles), necessary wiring and connectors, and batteries. Several U.S. companies offer conversion kits and premium lithium battery packs. Major manufacturers also offer complete e-bikes. Trek uses the Bionx system to provide a range of e-bikes in which riders program controllers to determine how hard the motors work in response to the rider's efforts, from 25% to 200% of the rider's power. The system ensures a minimum level of driver participation and is also used to comply with many European laws requiring partial human operation before the car is engaged.