tricycles

The PAL-V Liberty model designed by the PAL-V company in the UK can be flexibly changed between flight and steering modes to deal with traffic jams.

A group of students has developed a solar-powered tricycle, which enables people with disabilities to travel long distances without any assistance.

War and bombing have never suppressed human creativity, especially for two mechanical engineering students in Palestine.

Business Insider page has gathered unique bike design ideas that some designers have created.

An American inventor designed a tricycle capable of flying up and down like a helicopter.