Blockstory Bike Alarm Lock

The Blockstory Bike Alarm Lock combines a 110dB motion-sensing alarm with a 12mm hardened shackle in a standard U-lock form factor, providing both physical lock security and acoustic deterrence in a single device. The vibration sensor activates the alarm when the lock or bicycle is moved, tapped, or lifted — providing an early warning alarm stage at 80dB for minor vibration (wind, accidental contact) that escalates to full 110dB if sustained movement continues. This two-stage alarm behavior reduces false alarm fatigue while ensuring genuine theft attempts trigger maximum acoustic deterrence. The alarm runs on a built-in rechargeable battery charged via the supplied USB-C cable, providing approximately 6 months of standby time per charge. The 12mm boron steel shackle is Sold Secure Silver rated and provides cut resistance above the standard 12mm case-hardened shackle. A remote key fob arm and disarm the alarm without pressing any button on the lock body — practical for busy public areas where a beeping disarm sound would attract attention. Dimensions: 220mm × 95mm interior. Weight: 780g.