10 Best Kryptonite Bike Lock 2025 in the United States

The Kryptonite New-U New York Standard Heavy Duty Bicycle U Lock and Kryptonite Keeper 785 Integrated Bicycle Lock Chain are designed to offer high security for bike owners. The New-U lock features a 16mm hardened steel shackle, which is highly resistant to hand tools, bolt cutters, and leverage attacks, making it a reliable choice for high-theft areas. The interior locking dimensions of 4” x 8” provide ample space to secure your bike frame and wheels to various fixtures. Additionally, the product includes an Anti-Theft Protection Offer with up to $4,000 reimbursement and a Key Safe Program for easy key replacement.

However, its heavy-duty construction could affect portability, making it less convenient for those who need to carry it around frequently. The U lock's heavy weight might be uncomfortable for everyday commuters who prioritize lightweight gear. On the other hand, the Kryptonite Keeper 785 chain lock features 7mm four-sided chain links made from robust 3T manganese steel, enhancing its durability and security. The patent-pending end link design and hardened deadbolt provide extra holding power and reduce vulnerabilities. It is 33.5 inches long, offering flexibility in securing your bike to various objects. This chain lock is also available in multiple colors, adding a touch of personalization.

While it is slightly more portable than the U lock, its chain might be cumbersome to handle and store. Both locks are suitable for various environments, including major metropolitan areas, college campuses, and rural areas, covering both quick stops and overnight protection.

The Kryptonite New York Standard Bike U-Lock is designed for high security, featuring a 16mm hardened steel shackle that resists common theft tools like bolt cutters and leverage attacks. This makes it a robust choice for securing bicycles, e-bikes, and scooters. The lock also includes a secure mounting bracket, making it easy to carry during transportation, and its weather-resistant design adds durability against the elements.

The lock's interior dimensions of 4” x 8” provide ample space for securing your bike to various fixed objects. Additionally, it comes with a Key Safe Program that offers free replacement keys globally, and an Anti-Theft Protection Offer that reimburses up to $4,000 in case of theft within the first year, adding extra peace of mind for users.

However, at 4.45 pounds, it is relatively heavy, which may affect portability for some users. The lock type is a deadbolt, which is known for its security but might be slightly less convenient than some other locking mechanisms. Despite its weight, the lock's strength, included features, and additional security programs make it an excellent choice for those prioritizing high security for their bikes.

The Kryptonite Evolution Mini Bike Chain Lock is a robust option for securing your bike, motorcycle, scooter, or even gates and fences. Its heavy-duty, 10mm hardened steel chain with six-sided links offers strong resistance against cutting and leverage attacks, making it a solid choice for anti-theft protection. The lock features a patented locking system, including a high-security disc-style cylinder that resists picking and drilling, along with a reinforced oval crossbar lock head and a hardened deadbolt connection to eliminate weak points.

The 3-foot length allows for versatile locking options, though it may be a bit short for some users looking to secure both the frame and wheels together. Weighing 6.09 pounds, it’s not the lightest lock, which might affect portability for some users, but it's manageable for a chain lock of this strength. The weather-resistant nylon sleeve and durable rubber coating protect against scratches and extend the lock's lifespan, aided by a sliding dust cover for the cylinder.

Kryptonite’s Key Safe Program and optional Anti-Theft Protection Offer up to $3,000 coverage provide additional peace of mind, along with a lifetime warranty and responsive customer support. Despite its sturdy build, the lock’s weight and relatively short length could be drawbacks for those needing more flexibility and lighter options. However, for those prioritizing high security and durability, this lock is a highly reliable choice.