A folding bike is a compact bicycle designed to be easily folded for storage and transport. These bikes typically feature a hinge mechanism that allows the frame to collapse, making them ideal for urban commuting, travel, and small living spaces. They are lightweight and can often fit into car trunks, public transport, or under desks. Folding bikes come in various styles and sizes, catering to different riding preferences. Many models are equipped with features like adjustable seats, multiple gears, and sturdy frames. Popular brands include Brompton, Dahon, and Tern, each offering unique designs and functionalities to suit diverse riders.