The Mammoth Security Monster U-Lock provides maximum theft deterrence with its ultra-robust 16mm hardened steel shackle and premium reinforced body.
Built for riders who demand top-level protection, this heavy-duty lock is engineered to resist cutting, prying, and leverage attacks — even in high-risk environments.

Key Features

• 16mm Hardened Steel Shackle: Thick, cut-resistant shackle delivers exceptional strength and resilience.

• Premium Heavy-Duty Construction: Rigid, reinforced lock body designed to withstand serious theft attempts.

• Rubberised Protective Coating: Prevents damage to wheels and frames while improving weather resistance.

• Double Locking Mechanism Bar: Secures the shackle at both ends for maximum resistance against twisting and forced attacks.

• Weatherproof Key Cover: Protects the lock cylinder from water, dirt, and grit for long-term smooth operation.

• Generous Internal Dimensions:

  • 125mm external width (87mm internal)

  • 300mm internal length
    Suitable for securing through wheels, frames, and fixed anchor points.

Ideal For

• Motorcycles, scooters & mopeds

• High-risk parking areas

• Riders wanting maximum strength from a compact U-lock

• Pairing with chains for layered security

A formidable, high-security U-lock built to deliver serious theft protection in any environment.