A bike lock is a security device used to protect bicycles from theft. They come in various types, including U-locks, chain locks, and cable locks. Each type offers different levels of security and convenience, making it important for cyclists to choose the right one based on their needs and the environment where they park their bikes. Using a bike lock properly is essential for keeping your bicycle safe. Always lock your bike to a sturdy object, like a bike rack, and secure both the frame and the wheels. This makes it harder for thieves to steal your bike, ensuring that you can enjoy riding without worry.