Kryptonite

512 Plug-In Chain Lock - For Ring Lock

What Our Gearhead® Experts Are Saying:

"This is my go-to chain for pairing with a ring lock on urban and commuter bikes. It’s easy to deploy, adds a strong layer of protection, and keeps my locking setup clean and compact."

The Kryptonite 512 Plug-In Chain Lock is designed to enhance the protection of your bike when used with compatible ring locks like those from Kryptonite or AXA. This 120cm-long chain features 5.5mm hardened steel links that resist cutting and prying, turning your frame-mounted ring lock into a complete anti-theft system that secures not only the wheel but also the entire bike to a fixed object.

The chain plugs directly into the ring lock body, preventing all forms of unauthorized movement—including roll-aways and lift-and-carry theft. With optional plug-in accessories like a 10mm cable or 9mm chain, it can be tailored to fit different locking needs. Its non-key-retaining function adds flexibility, allowing you to remove the key even when the system is unlocked.

Whether you're locking up in high-traffic city centers or parking your ride outside the office, the 512 Plug-In Chain brings modular, dependable, and commuter-ready security to your daily setup.