Kryptonite Folding Bike Lock Keeper 510 — 100 cm Compact Lightweight Foldable Lock with Frame Mount

The Kryptonite Keeper 510 is a compact, foldable bicycle lock that balances portable convenience with solid cut resistance for short stops and everyday urban use.

If you need a reliable way to secure your bike, e-bike or scooter without carrying heavyweight chain locks, the Keeper 510 delivers a practical compromise: hardened steel links wrapped in a protective skin, a usable 100 cm reach, and a frame-mount bracket for easy transport. Rated mid-level on Kryptonite’s security scale, it’s designed to deter opportunistic thieves and protect your ride during errands, commutes, and quick breaks in moderate-risk areas.

How does this lock protect my bike during quick stops?

The Keeper 510 uses multiple 3 mm hardened-steel link segments joined by rivets, creating a compact folding bar that resists snips and cuts more effectively than lightweight cable locks. Its rubberized outer coating prevents paint damage while increasing abrasion resistance. For short errands and busy city moments, its design is meant to delay theft attempts and make your bike a less appealing target.

• 3 mm hardened-steel folding links for improved cut resistance
• rubberized sleeve protects frame finishes
• compact profile reduces chances of opportunistic theft

Can I carry the Keeper 510 on my bike or in a bag?

Yes — the lock is engineered for portability. It weighs about 1.9 pounds and comes with a user-friendly mounting bracket that fastens to most bike frames, or you can tuck it into a backpack without taking much room. The bracket installs quickly so you can ride without worrying about extra bulk or rattling.

• lightweight at approximately 1.90 lbs for all-day carry
• includes an easy-install transport bracket for frame mounting
• foldable shape compacts to fit backpacks or panniers

What kinds of situations is this lock suitable for?

The Keeper 510 is best for lower- to medium-risk settings: city errands, short storefront stops, commuter bike racks in busy areas, and overnight storage in low-crime neighborhoods. It’s not intended to replace heavy-duty chains or U-locks in high-risk environments, but it provides convenient, real-world protection where bulky locks are impractical.

• ideal for short urban stops and commuter use
• suitable for scooters, road and mountain bikes, and many e-bikes
• not recommended as sole protection in high-theft zones

What extras come with the lock and how do they help me?

The Keeper 510 arrives with two cut-resistant keys and qualifies for Kryptonite’s Key Safe replacement program and Anti-Theft Protection Offer when registered. The extra key reduces the risk of being locked out, and program registration provides added peace of mind if your keys are lost or your bike is stolen under qualifying conditions.

• two keys included for backup and shared access
• eligible for Kryptonite Key Safe key replacement
• registration may qualify the lock for anti-theft protections

Who is this for: The Kryptonite Keeper 510 is aimed at cyclists who prioritize portability and flexibility—commuters, urban riders, and anyone who needs dependable everyday security without lugging heavy hardware. If you want a compact lock with a reasonable security rating for quick stops, multi-vehicle use, and easy mounting, the Keeper 510 is a practical, lightweight choice. For extended parking in high-risk locations, combine it with additional locking methods or choose a higher-rated security product.