The OnGuard Bulldog ATB U-Lock delivers powerful, high-security protection for bicycles, scooters, ATBs, and e-bikes. Built with an 11–13mm hardened steel shackle, this lock resists cutting, prying, and leverage attacks, providing dependable everyday security in high-risk areas. The wide crossbar design offers extra room for securing thicker frames or multiple components, while the X2P Double Bolt Locking Mechanism secures the shackle on both sides for best-in-class pull resistance. OnGuard’s Z-Cylinder provides advanced anti-theft defense by resisting bumping, picking, pulling, and drilling. A centered keyway and rounded design help eliminate pry points, and the double rubber-coated crossbar cover prevents scratches. Includes eight laser-cut keys, one with micro-LED, plus mounting bracket.
- Wide Crossbar Clearance for Flexible Locking: Designed with an expanded crossbar width to secure ATBs, scooters, and thicker frames with ease, offering more locking options in crowded racks or urban environments.
- X2P Double Bolt Locking System: Dual-sided shackle engagement provides superior resistance against pulling, twisting, and prying attacks, giving your bike or scooter next-level security in medium to high-risk areas.
- 11–13mm Hardened Steel Shackle: Heavy-duty steel construction resists cutting, jacking, and leverage attacks. Rounded, centered keyway eliminates common pry points and improves long-term tamper resistance.
- Advanced Z-Cylinder Anti-Theft Core: Precision cylinder is bump-proof and engineered to resist picking, pulling, and drilling. Double rubber-coated crossbar cover protects your bike’s finish, while molded end caps absorb impacts.
- Complete Security Kit Included: Comes with 8 laser-cut keys (including 1 micro-LED key for night use) plus a versatile all-tube mounting bracket for convenient transport on virtually any bike frame.
