Cycle
A cycle can come in many different forms and are used for everything from work to enjoyment. A bicycle has two wheels, a tricycle three and motorcycle has an engine attached. All have pedals besides motorcycles which typically have foot pegs as no pedaling is involved. They all steer with the front wheel and typically have brakes on all wheels.
A cycle can be used to get from one place to another, it can haul materials and goods, it can be ridden for fun and it can be ridden for work. There are law enforcement applications as well as extreme sports applications and each bike can vary greatly in design and materials. Racks can be attached as well as trailers.
A cycle can vary greatly in weight and size as well. The lighter and stronger the bicycle the more expensive it will generally be. The addition of suspension also adds a lot of cost and weight, but allows for a much smoother ride and is always included on mountain bikes. Most parts are interchangeable to a certain degree and they can be individually upgraded for better performance or lower weight.