Kryptonite

Kryptonite Keeper 785 Chain Lock

★★★★☆ 4.3/5 (4 customer reviews)
Overall Score4.3/5.0
Expert Verdict

The Kryptonite Keeper 785 Chain Lock is an excellent choice for urban cyclists seeking a balance of strong security and portability. While not the heaviest-duty lock on the market, its manganese steel chain and advanced locking mechanism provide reliable protection for everyday use. Recommended for riders who want dependable bike security without carrying excessive weight.

Key Features

  • 7mm four-sided chain made from 3t manganese steel for high cut resistance
  • 85cm length suitable for locking to various bike racks and poles
  • Disc-style cylinder lock that is pick and drill resistant
  • Protective nylon sleeve to prevent bike frame scratches and resist weather
  • Transit Flex Frame Bracket included for easy and secure mounting
✓ Pros
  • Strong manganese steel chain offers excellent cut resistance
  • Lightweight and portable compared to heavier chain locks
  • Secure disc-style lock mechanism enhances security
  • Convenient frame bracket for easy transport and access
✗ Cons
  • Length may be limiting for locking multiple bikes or larger objects
  • Chain thickness not sufficient for extremely high-risk environments
  • Nylon sleeve can wear over time with heavy use

Full Review

The Kryptonite Keeper 785 Chain Lock is a reliable and robust security solution designed for cyclists who value both strength and convenience. Featuring a 7mm four-sided chain made from 3t manganese steel, this lock offers high resistance against bolt cutters and leverage attacks, ensuring your bike stays safe in various urban environments. Its integrated protective nylon sleeve prevents scratches on your bike frame while adding a layer of weather resistance.

Weighing in at just over 2 pounds, the Keeper 785 strikes an excellent balance between security and portability, making it easy to carry on longer rides or daily commutes. The lock uses the Kryptonite disc-style cylinder, which is pick and drill resistant, providing an additional layer of security against tampering. The included Transit Flex Frame Bracket allows for convenient mounting on most bike frames, ensuring quick access when you need to secure your bike.

Ideal for securing medium to high-risk bikes, the Keeper 785 is best suited for urban riders who require dependable protection without the bulk of heavier chain locks. Its 85cm length is long enough to lock your bike to a variety of bike racks or poles, offering versatile usage. Overall, the Kryptonite Keeper 785 Chain Lock is a well-rounded product that combines durability, security, and user-friendly features for everyday cycling security.

Customer Reviews

Emily R. March 2025
★★★★★
Reliable and easy to carry
I've been using the Kryptonite Keeper 785 for several months, and it’s been fantastic. The lock feels solid and secure, and the included frame bracket makes it easy to carry on my daily commute. Definitely gives me peace of mind.
James T. January 2025
★★★★☆
Good security for the price
This lock provides good security with a strong chain and a quality lock mechanism. The only downside is the chain length, which sometimes feels a bit short for locking to larger objects. Still, a great value overall.
Sophie M. February 2025
★★★★☆
Protects my bike well
I appreciate the protective sleeve that prevents scratches on my bike frame. The chain is strong and heavy enough to deter thieves without being too cumbersome. I’d recommend this lock for city riders.
Michael B. December 2024
★★★★☆
Solid lock with minor flaws
The lock is sturdy and the disc-style cylinder gives me confidence against picking attempts. However, the nylon sleeve started showing wear after a few months. Otherwise, it’s a solid choice for everyday bike security.