10 Best Bike Chain Locks 2025 in the United States

The Sportneer Bike Lock is a solid choice for those needing a reliable and secure bike-chain-lock. Made from ultra-thick 0.236 inch (6mm) manganese steel, it offers robust resistance against cutting and sawing, while the zinc alloy lock core adds extra protection, ensuring durability. The 5-digit combination lock provides high security with up to 100,000 possible combinations, eliminating the need for keys and enhancing convenience. This keyless design makes it highly practical for everyday use.

The lock is available in 3.2 feet length, which suits locking one or two bikes together depending on needs, though it might be somewhat short for other applications. Its weight of 1.57 pounds is manageable for most users but could be slightly heavy for those who prefer lighter locks for easier transport. The polypropylene fabric cover is a thoughtful addition, offering scratch resistance and preventing rust, while the dustproof cap protects the lock mechanism from weather elements like rain and sand.

Setting and resetting the combination is straightforward, making it user-friendly even for those who are not tech-savvy. However, users should ensure compatibility with tire gaps or other locking points as the 1.3 inches lock head might be too large for some spaces. Given its heavy-duty build, ease of use, and high security, this lock is particularly suitable for urban cyclists and those who need to secure their bikes in high-risk areas. Some users might find it too bulky for light, casual use. In essence, the Sportneer Bike Lock brings a good balance of security, durability, and convenience, making it a strong contender in the bike-chain-lock category.

The Master Lock Cable Lock is a versatile option designed for securing bikes, ATVs, grills, and lawn mowers. It stands out due to its adjustable locking mechanism that allows you to set the cable tight at any length between 6 inches and 6 feet, making it adaptable for various uses. The cable is made from braided steel, which provides strength and flexibility, while the vinyl coating helps prevent scratches and offers weather resistance to avoid rusting.

Additionally, it features a 4-dial combination lock, eliminating the need for keys and allowing you to set your own combination for convenience. Measuring at 6 feet long and with a 5/16-inch diameter, it's relatively lightweight and easy to carry around. The vinyl coating offers some protection against weather, although it may not be robust enough for extremely harsh conditions. Also, the 5/16-inch thickness might not be as secure as thicker chains against more determined theft attempts.

This lock is best suited for those looking for a flexible and easy-to-use locking mechanism for moderate security needs.

The Kryptonite Keeper 712 Bike Chain Lock is a robust and reliable choice for securing your bicycle, motorcycle, or other outdoor items. Made from 7mm hardened steel with four-sided links, it offers strong resistance against cutting and leverage attacks, which significantly enhances its security. The chain extends up to 4 feet (120cm) in length, providing ample reach to secure your bike to various fixed objects.

The lock features a high-security disc-style cylinder that is resistant to picking and drilling, adding an extra layer of protection. Additionally, the patented end link design securely connects the chain to a hardened deadbolt, removing potential weak points that could be exploited by thieves. The lock is moderately heavy at 1.70kg (3.75 lbs), which may be slightly cumbersome for some users but is a trade-off for the increased security.

It includes two keys, and Kryptonite offers a Key Safe Program where they will ship replacement keys globally for free if you register your unique key code on their website. The Keeper 712 also includes a durable rubber coating to prevent scratches on your bike and a weather-resistant nylon sleeve to protect against the elements. This lock is rated 5/10 for moderate security, meaning it is suitable for areas with a relatively low risk of theft. However, for high-risk areas, you may want to consider a lock with a higher security rating.