To prevent bike theft, it is essential to use a high-quality lock, such as a U-lock or chain lock, which is more difficult for thieves to break. Always lock your bike in a well-lit, busy area and secure both the frame and wheels to a fixed object. Additionally, consider registering your bike with local authorities or online databases. This can help recover your bike if it is stolen. Taking photos of your bike, noting its serial number, and keeping receipts can also aid in identification and recovery efforts.