A bicycle tire is a rubber covering that fits around the wheel of a bicycle. It provides traction, support, and cushioning for the rider. Bicycle tires come in various sizes and types, including road bike tires, mountain bike tires, and hybrid bike tires, each designed for specific riding conditions and surfaces. The tire is typically filled with air, creating a cushion that absorbs shocks from bumps and uneven terrain. Proper tire pressure is essential for optimal performance and safety. Regular maintenance, such as checking for wear and tear, helps ensure a smooth and safe ride.