tricycles

A tricycle is a three-wheeled vehicle powered by human effort, electric assist, or a motor. It typically has a rigid frame, a seat, handlebars, and a drivetrain that drives one wheel. Compared with a bicycle, it offers greater lateral stability and a larger seating position, making it common for children, commuting, or mobility devices. Variants include upright, recumbent, and cargo designs, which can be manually powered or motorized.

Two common configurations are delta and tadpole. A delta has one wheel at the front and two at the rear, while a tadpole has two wheels at the front and one at the rear. Recumbent trikes place the rider in a reclined position with a lower center of gravity. Cargo and electric-assisted trikes are common for adults and commercial use.

The tricycle originated in the 19th century as a stable alternative to bicycles and developed into toys and practical transport. Production expanded in the late 1800s and 20th century, leading to specialized designs for children, adults, and commercial needs in various regions.

Today tricycles are used for recreation, daily commuting, senior or disabled mobility, and cargo transport. Safety factors include braking, stability at low speeds, and tire condition. Electric assists extend range, but weight and power require careful management. Regular maintenance and proper sizing support safety and comfort.