Kryptonite Kryptolok Series 2 Chain Lock

This lock weighs 6.7 lbs. While it provides substantial security, it is on the heavier side, so it is best suited for riders who prefer to keep the lock attached to their bike frame or who have a dedicated storage spot at their destination.

The 9mm links are standard for this security level. While they are thick enough to deter bolt cutters, they are flexible enough to thread through most bike frames and standard wheel spokes, though they may be a tight fit for some very narrow racing bike frames.

Yes, the weather-resistant nylon sleeve acts as a protective barrier between the hardened steel chain and your bike's frame. It is durable enough to withstand daily wear and tear while keeping your finish looking clean.

Kryptonite offers a Key Safe Program for this model. If you register your keys with them after purchase, they can send you replacements if yours are lost or stolen.

With a length of 1200mm (approximately 4 feet), this chain offers significant versatility. It is long enough to secure your frame and one wheel to most standard bike racks, street signs, or parking meters in urban environments.

The integrated deadbolt design connects the lock head directly to the chain, eliminating the need for a separate padlock. This removes the common vulnerability of a shackle, which is often the weakest point on traditional chain-and-padlock setups.