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Are you fed up with the daily struggle to squeeze your high-security bike lock through your bike and around that large post? Struggle no more! Kryptonite has come up with a lock called the Kryptonite Keeper that has some of the anti-theft properties of a solid D-lock but with the flexible movement of a cheap cable lock, and it’s done this with a series of pivot points with 360 degrees of rotation.

When unpacked, it gives you a metre of chain-like bar that should be plenty to wrap through the frame, a wheel and a bike stand. A soft neoprene wrapping over the length of the lock should be sufficient to keep your bike from getting scratched or chipped when feeding the links through.

Check out the new @kryptonitelock folding lock. Super secure but fits in your pocket. Click To Tweet

Storage is a really neat feature with the Kryptonite Keeper Foldable. Having unlocked your beloved steed, you aren’t left with a mass of chain to dump into a bag; the lock folds up really easily into a compact block that then sits in the included carrier.

The Kryptonite Keeper 810 uses 8mm hardened steel chain links and is covered by the Kryptonite anti-theft protection scheme. To save a bit of money, you can opt for the Keeper 695 that uses 6mm links and has no anti-theft protection. Note that neither lock’s security rating is near that of their standard D-lock: the Keeper 695 is rated 4/10; the Keeper 810 is a 5/10; whilst the New York Standard (D-lock) is 9/10. Even the Kryptonite Evolution 1090 chain (with 10mm 6-sided chain links) is rated an 8/10, but it can’t be stowed away neatly like the Kryptonite Keeper Foldables.

To wrap up, the Keeper Foldable is a tidy package that is easy to carry, and with enough security to deter the opportunist thief.


Released soon (we’ll update article)

Ryan Nesbitt

Dad, Cyclist, Marketeer, QPR fan and lover of most things Design & Tech. A former Personal Trainer with too many injuries from Running, Football and Rugby; he found Cycling and never looked back. Ryan is founder and regular writer at You can find him on Instagram at @CyclingChap

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