Motorcycle Alarm Disc Brake Lock

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

Whether you park on the street, in an apartment courtyard, or at a commuter lot, adding a visible mechanical lock with an audible alarm reduces theft risk and gives you a straightforward layer of protection. This compact aluminum-alloy disc lock combines a high-decibel siren, motion sensors and a 1.5m reminder cable so you notice the lock before riding away. It’s designed for everyday use, built to resist rain and replaceable-battery operation so you can maintain it easily.

How does the alarm activate and stop?

The lock arms the alarm automatically after the locking sequence completes; built-in sensors detect shock and movement and trigger the 110dB siren. To silence the alarm, unlock with one of the supplied keys. There is also a short delay and internal logic to reduce false triggers.

• Press lock button to start arming sequence; audible beep confirms activation after five seconds
• 110dB alarm sounds on shock or vibration detection
• Use included key to deactivate alarm immediately
• Internal algorithm reduces abnormal false alarms

Will this lock withstand weather and long-term outdoor use?

The housing is machined from aluminum alloy and sealed to resist rain and everyday outdoor exposure. The unit accepts a replaceable battery, so you can restore power without replacing the entire lock when levels drop.

• Aluminum-alloy body provides corrosion resistance and light weight
• Water-resistant design suitable for rain and splashes
• Replaceable battery for easy maintenance and longer service life
• Supplied carry pouch protects the lock when not in use

Which motorcycles and bikes will this disc lock fit?

This disc lock is compatible with most motorcycles, scooters and bicycles that have a disc brake rotor with holes and a rotor thickness under approximately 7 mm (1/4 in). It’s a versatile option for mopeds, scooters, mountain bikes and many e-bikes.

• Ideal for bikes and motorcycles with ventilated or drilled rotors
• Works with rotor thickness up to about 7 mm
• Compact form makes it suitable for scooters and smaller frames
• Includes 2 keys and hex key for straightforward operation

What comes in the box and how do I use the reminder cable?

The package contains the alarm disc lock with batteries installed, two mechanical keys, a hex key, a 1.5 m (5 ft) reminder cable and a soft carry pouch. Thread the reminder cable from the lock to your handlebar or mirror to prevent riding off with the lock still engaged.

• 1 x alarm disk lock (batteries included) for out-of-the-box use
• 2 x keys and 1 x hex key for unlocking and maintenance
• 1 x 1.5 m reminder cable to attach to handlebar or mirror
• 1 x pouch keeps the lock protected in storage

Who is this for? If you want a simple, visible deterrent that also provides an audible alarm—without complicated electronics or an app—this Mathtoxyz disc brake lock suits commuters, apartment-dwellers, students and anyone who leaves a motorcycle, scooter or bike parked outdoors. It’s aimed at riders who prefer a mechanical locking device with an integrated alarm and a low-maintenance design that’s easy to install and carry.