Kryptonite Keeper 12 Standard – 12 mm Bicycle U-Lock
The Kryptonite Keeper 12 Standard U-lock offers a practical balance of security, durability and everyday convenience. Designed for cyclists looking for a dependable bicycle lock, it features a 12 mm hardened steel shackle, a reinforced locking mechanism and a disc-style cylinder.
With a Kryptonite security rating of 5 out of 10, the Keeper 12 Standard is particularly well suited for everyday stops, commuting and recreational cycling in moderate-risk environments.
Its standard-size U-shaped design provides a convenient way to secure a bicycle to a suitable fixed object, while the included mounting bracket makes transporting the lock easier.
Key Features
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12 mm hardened steel shackle: Provides resistance against common hand tools and physical attacks.
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Hardened anti-rotation deadbolt: Designed to resist twisting forces and improve the integrity of the locking mechanism.
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Disc-style cylinder: Features a centrally positioned keyway for enhanced resistance to tampering.
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Kryptonite security rating of 5/10: Offers a moderate level of protection for everyday bicycle security.
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Standard U-lock dimensions: Measures approximately 10.2 × 20.3 cm (4 × 8 inches).
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Protective vinyl coating: Helps reduce the risk of scratches when the lock comes into contact with the bicycle frame.
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Two stainless steel keys: Ergonomic design helps reduce excessive torque during operation.
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Included mounting bracket: Side-mounted snap-in bracket allows convenient transportation on a compatible bicycle.
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Key Safe Program: Eligible for Kryptonite's replacement key service, subject to program conditions.
Technical Specifications
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Brand: Kryptonite
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Model: Keeper 12 Standard
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Manufacturer part number: 004196
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Product type: Bicycle U-lock
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Locking mechanism: Key-operated
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Shackle material: Hardened steel
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Shackle diameter: 12 mm
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Deadbolt: Hardened anti-rotation design
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Cylinder: Disc-style with center keyway
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Dimensions: 10.2 × 20.3 cm (4 × 8 inches)
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Manufacturer-listed weight: Approximately 930 g (2.05 lb)
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Security rating: 5/10 on Kryptonite's security scale
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Protective coating: Vinyl
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Keys included: Two stainless steel keys
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Mounting bracket: Included
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Additional security cable: Not included
12 mm Hardened Steel Construction
At the heart of the Keeper 12 Standard is a 12 mm hardened steel shackle designed to provide resistance against common hand tools and physical attacks.
The rigid U-shaped construction provides a practical alternative to basic cable locks for cyclists seeking a more substantial everyday security solution.
Its protective vinyl coating helps minimize direct metal-to-frame contact, reducing the risk of cosmetic scratches during normal handling.
Reinforced Locking Mechanism
The Keeper 12 Standard incorporates a hardened deadbolt with an anti-rotation design intended to resist twisting forces.
Its disc-style locking cylinder features a centrally positioned keyway, providing an additional security feature compared with simpler locking mechanisms.
Together, these components create a durable and practical system for regular bicycle use.
Moderate Security for Everyday Cycling
Kryptonite assigns the Keeper 12 Standard a security rating of 5 out of 10.
This places it within the manufacturer's moderate-security range, making it suitable for everyday bicycle parking in relatively lower-risk environments.
It is particularly relevant for commuting, recreational cycling and shorter stops where a practical, easy-to-transport U-lock is preferred.
For extended parking in high-theft environments, cyclists should consider a higher-security lock or additional protection.
Convenient Transportation and Everyday Use
The included side-mount snap-in bracket provides a convenient way to carry the lock on a compatible bicycle frame.
Two ergonomic stainless steel keys are included, allowing riders to keep a spare key available.
The lock is also eligible for Kryptonite's Key Safe replacement program, subject to registration and applicable conditions.
A Reliable Choice for Bicycle Security
The Kryptonite Keeper 12 Standard bicycle U-lock combines hardened steel construction, a reinforced locking mechanism and practical accessories in a versatile everyday package.
For cyclists seeking moderate security without moving to a heavier, high-security lock, the Keeper 12 Standard offers a straightforward solution for protecting a bicycle during regular stops and recreational outings.
Package Contents: One Kryptonite Keeper 12 Standard U-lock, two stainless steel keys and one mounting bracket.
