OnGuard Pitbull Medium U-Lock – 14 mm Hardened Steel Shackle (90 × 175 mm) – X4P Quad Lock, Z-Cylinder, TriRadius Design, 5 Keys & Mount Bracket

The OnGuard Pitbull Medium U-Lock delivers premium-grade security for riders who demand robust protection in high-risk environments. Featuring a 14 mm hardened steel shackle and X4P Quad Lock system, it locks on all four sides for ultimate strength against twisting and prying. The precision Z-Cylinder core resists bumping, drilling, and picking, ensuring dependable anti-theft performance. A TriRadius shackle design offers extra locking room for easier use, while co-molded crossbar covers and rubber coating safeguard your bike’s finish. Includes five laser-cut keys and a durable mounting bracket. Dimensions: 90 x 175 mm (3.55 x 6.90").

• Maximum Security: 14 mm hardened steel shackle combined with X4P Quad Lock secures on four sides, providing superior protection from cutting, twisting, and prying.
• Compact Yet Strong Design: Internal locking area of 90 x 175 mm (3.55 x 6.90") balances portability with reliable theft resistance.
• Anti-Tamper Cylinder: Z-Cylinder core is engineered to withstand bumping, drilling, and picking for consistent, long-lasting locking reliability.
• Flexible TriRadius Design: Unique shackle shape increases locking space and simplifies attachment to poles, rails, and crowded bike racks.
• Complete Package: Includes five precision laser-cut keys and an all-tube mounting bracket for convenient daily use and transport.