The Cyr wheel is a large, single wheel used in circus and acrobatic performances. It is designed to be spun and manipulated by a performer, who moves inside the wheel to execute various tricks and routines. The Cyr wheel allows for a range of movements, including spins, rolls, and dynamic shifts in direction, creating a visually captivating effect. Performers use their balance and strength to control the wheel and perform complex, graceful maneuvers while maintaining the wheel's motion.