Folding bikes are compact bicycles designed to be easily folded for storage and transport. They typically feature a hinge mechanism that allows the frame to collapse, making them ideal for urban commuting, travel, and limited storage spaces. Many models are lightweight and can fit into car trunks, public transportation, or under desks. These bikes come in various styles and sizes, catering to different riding preferences. Some popular brands include Brompton, Dahon, and Tern. Folding bikes often have smaller wheels, which can affect ride quality, but advancements in design have improved their performance and comfort significantly.