Motorcycle Alarm Disc Brake Lock

Mathtoxyz Motorcycle Alarm Disc Brake Lock is a weather-resistant disc lock with a 110dB shock sensor alarm, 5ft reminder cable, two keys and a carry pouch to deter theft and protect parked bikes.

Designed for riders who leave their motorcycle, scooter or e-bike parked outdoors or in shared spaces, this compact disc brake lock combines a loud alarm with a visible physical barrier. Built from aluminum alloy with a waterproof finish and replaceable battery, the lock fits most disc rotors under 7mm thick and triggers an immediate audible alert when tampered with.

How loud is the alarm and when does it trigger?

The unit emits a 110dB alarm driven by built-in shock sensors that detect vibration, impact or unauthorized movement. Activation occurs automatically after the lock is engaged and the brief initialization sequence completes, designed to scare off opportunistic thieves and draw attention to tampering.

• 110dB alarm volume for strong audible deterrence
• Shock and motion sensors detect impacts and movement
• Automatic arming five seconds after locking to prevent false triggers
• 30-second auto-shutoff if not disarmed with the key

Will this fit my motorcycle or scooter?

The Mathtoxyz disc lock is made to accommodate most motorcycles, scooters, mopeds, e-bikes and bicycles that have disc rotors with holes and a thickness less than 7mm (about 1/4 inch). Check your rotor thickness and hole placement to ensure the lock pins can secure through the rotor opening.

• Suitable for rotors thinner than 7mm (1/4") with mounting holes
• Works on motorcycles, scooters, mopeds, e-bikes and some bikes
• Compact form factor for easy storage in the included pouch
• Includes hex key for minor adjustments during installation

How simple is it to use daily?

Using the lock is straightforward: press the alarm lock button, wait the short beep signaling successful arming, and the alarm will monitor the wheel. To stop the alarm you can either use one of the supplied keys to unlock it or wait the brief auto-off period, and the replaceable battery keeps maintenance low.

• One-button locking action with audible confirmation beep
• Two keys included to avoid lockouts
• Replaceable battery for long-term use
• 1.5m (5ft) reminder cable included to prevent accidental riding with the lock on

How does it hold up outdoors and in bad weather?

The lock housing is crafted from aluminum alloy and finished to resist water and corrosion, so it can stay mounted while parked outside. Engineers designed the electronics and casing to limit abnormal false alarms and to remain functional through typical rain and damp conditions.

• Aluminum alloy body for strength and corrosion resistance
• Waterproof construction keeps electronics protected
• Engineered algorithms reduce accidental alarm triggers
• Comes with a carry pouch for dry storage when not in use

Who is this for: Mathtoxyz’s Motorcycle Alarm Disc Brake Lock suits riders who want a compact, visible physical deterrent paired with a loud alarm for short-term parking on streets, workplaces, apartments, or public lots. It’s especially helpful for scooter and e-bike users, commuters, and anyone seeking an added layer of security without carrying heavy chains. Verify your rotor thickness and hole pattern before purchase to ensure compatibility, and keep the included keys and reminder cable handy for everyday convenience.