Kryptonite Keeper 755 Chain Lock

The Keeper 755 is designed for moderate-risk environments. While its 7mm manganese steel links offer strong cut resistance, it is best used as a secondary lock or for shorter stops in urban areas rather than as a primary security solution for high-risk, overnight storage.

This lock weighs approximately 3.75 lbs. While it offers more flexibility than a rigid U-lock, the weight is noticeable, so most riders prefer carrying it wrapped around the seat post or stowed in a bag while commuting.

No, the chain is encased in a durable, weather-resistant nylon sleeve. This protective cover prevents the metal links from making direct contact with your bike's paint or finish.

Kryptonite offers a Key Safe Program, which allows you to register your key number with them. If you lose your keys, you can request replacements directly through the manufacturer.

The lock is designed to be weather-resistant, but it is good practice to occasionally spray a silicone-based lubricant into the keyway. This keeps the internal mechanism moving smoothly and prevents debris buildup.