Sunlite Knox U-Lock

The combination of a 10mm hardened steel chain and a heat-treated U-lock provides significantly higher resistance to cutting and prying tools compared to standard cable locks. This setup is designed for high-theft areas where a more robust physical barrier is required.

No, the chain is encased in a durable, weatherproof nylon sleeve. This cover acts as a protective buffer between the steel links and your bike's frame to prevent scratches and abrasions.

Yes, the 46-inch length provides enough reach to secure your frame and one wheel to most standard bike racks, poles, or benches. The added flexibility of the chain makes it much easier to maneuver around irregular objects than a rigid U-lock alone.

The lock weighs 5.9 pounds. While it is substantial enough to offer high security, it is best suited for riders who can leave the lock at their destination or those who don't mind carrying the extra weight in a pannier or backpack during their commute.

We recommend keeping the spare key in a secure, memorable location at home immediately after purchase. Because this is a high-security lock, replacement keys are not easily replicated, so it is vital to keep track of the remaining key.