Check the listing for details. Kryptonite York U-Lock 4x8 Keyed Black Bike Lock High-Security Steel, Transit. Condition: New. Listed at 299.46 USD. Secure Your Bike with the Kryptonite York U-Lock 4x8 Keyed Heavy-Duty Bike Lock Bundle Protect your bicycle with confidence using this premium Kryptonite York U-Lock bundle, featuring three high-security, keyed U-locks designed for maximum durability and theft resistance. Crafted from hardened MAX-Performance steel, these 16mm shackle U-locks deliver industry-leading strength against bolt cutters, leverage tools, and tampering, ensuring your bike stays safe in any environment. Engineered for superior performance, each lock includes a double deadbolt design that provides extensive holding power and a higher security disc-style cylinder for enhanced pick resistance. The innovative Transit Flex Frame Bracket allows flexible mounting options, accommodating various bicycle frames and.