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OnGuard Bull Dog U-Lock

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  • X2P double bolt locking mechanism
  • Heat treated steel crossbar with hardened tube, coated with rubber
  • Double locking mechanism for extensive holding power
  • Includes 5 keys
  • Anti-rattle bumpers
  • Dimensions - 4.5" x 9"


The On Guard Bull Dog U Lock offers incredible protection at a great price. With an easy and secure mounting system and a $1501 bicycle protection guarantee, this is a perfect option for those looking to step up security on their ride.