Mathtoxyz Motorcycle Disc Brake Lock — Waterproof 110dB Alarm, 5ft Reminder Cable, Aluminum Alloy

Mathtoxyz Motorcycle Alarm Disc Brake Lock is a compact, weather-resistant disc lock with a 110dB built-in alarm, 5ft reminder cable, two keys, and a carry pouch to deter theft and protect your bike while parked.

Easy to mount on most disc-brake motorcycles, scooters, e-bikes, and bikes, this lock combines a physical barrier with a loud alarm to discourage tampering. Made from aluminum alloy and designed for outdoor use, it includes a replaceable battery and intuitive operation so you can secure your ride quickly when leaving it in public, at home, or at work.

How loud is the alarm and when will it activate?

The built-in alarm emits a 110dB sound level designed to draw attention when the lock detects shock or movement. Sensors monitor vibrations and will trigger the siren immediately, giving an audible warning to bystanders and potentially deterring thieves.

• 110dB alarm volume for high audibility.
• Motion/shock sensors activate the siren automatically.
• Engineered algorithms reduce false or abnormal triggers.

How simple is it to lock and unlock the disc brake lock?

Operation is straightforward: press the alarm lock button to engage the mechanism; after about five seconds a beep confirms activation. To turn the alarm off, insert the supplied key to unlock, or wait the brief auto-shutoff period and use the key—either method returns the unit to standby.

• One-button activation with audible confirmation beep.
• Two included metal keys for manual unlocking.
• 30-second auto-shutoff option to stop continuous alarms if needed.

Will this lock withstand weather and everyday outdoor use?

The housing is built from aluminum alloy and rated for outdoor conditions so it resists rain and moisture during regular use. The alarm runs on a replaceable battery, letting you maintain reliable performance over time without replacing the whole device.

• Aluminum alloy body for corrosion resistance.
• Waterproof construction suitable for exposed parking.
• Replaceable battery for easy long-term maintenance.

Does it fit my motorcycle, scooter, or bicycle?

This disc brake lock fits most vehicles whose brake rotors have holes and are up to about 7mm thick. It works on a wide range of two-wheelers—motorbikes, mopeds, scooters, mountain bikes, and many e-bikes—offering versatile protection across models.

• Compatible with rotors that have holes and ≤7mm thickness.
• Suitable for motorcycles, scooters, mopeds, mountain bikes, and e-bikes.
• Includes a 1.5m (5ft) reminder cable to prevent accidental riding with the lock on.

Who is this for: Riders and commuters who park outdoors or leave their two-wheelers in public places and want a low-effort security solution that combines a visible physical lock with an audible alarm. It's also a good pick for apartment residents, delivery riders, and anyone who wants an easy-to-replace battery and a compact carry pouch for daily use.