A practical choice for e-bike and motorcycle owners who want lightweight disc-lock security with audible movement and cut alarms for stops, commuting and outdoor parking.
The ULAC Air Alarm is a compact alarm disc lock for e-bikes and motorcycles. Its movement and shock sensors activate a 120 dB alarm when the locked vehicle is disturbed, while cut detection provides a second audible alert if the lock itself is attacked. Auto arming makes it straightforward to secure your bike when you stop.
Inside the lightweight aluminium-alloy body is a steel frame and stainless-steel internal assembly. The 6 mm steel pin provides the locking connection, while the anti-dust lid helps protect the cylinder. At just 156 g, it adds useful security without becoming a burden in a riding bag.
The Air Alarm is rain proof for everyday outdoor use and includes three high-security Abloy keys with 2,000 unique key combinations. You also receive an orange reminder cable, a pre-installed CR2 battery, an Allen key and a protective storage bag, making this a practical choice for commuters, e-bike owners and motorcycle riders who want an audible warning as well as a physical lock.
120 dB shock alarm
Movement and shock detection triggers a loud audible warning when your locked bike or motorcycle is disturbed.
Cut alarm protection
The alarm also responds when the lock is attacked, adding another layer of tamper awareness.
Lightweight construction
The lock weighs just 156 g, making it easier to carry between rides.
Steel locking hardware
A 6 mm steel pin, steel frame and stainless-steel internal assembly provide the lock’s robust core.
High-security Abloy keys
Three supplied keys and 2,000 unique key combinations provide practical key-operated security.
Rain proof design
The lock is designed for use in wet outdoor conditions.
Auto arming
The alarm arms automatically after the lock is secured, simplifying everyday use.
Useful carry accessories
The package includes an orange reminder cable, pre-installed CR2 battery, Allen key and protective storage bag.
General
Materials & construction
Dimensions & weight
Electronics
Security
What's included
Neo Alarm
The alarm platform combines a compact lock design with movement detection and a powerful 120 dB alarm to help deter tampering around your parked bike or motorcycle.
Shock / Movement Sensors
Movement sensing triggers the alarm when the locked vehicle or bike is disturbed, adding an audible warning before an attempted theft progresses.
Cut Alarm
Cut detection activates the 120 dB alarm when the lock is attacked, giving you a clear audible alert during tampering.
Stainless-steel internal assembly
The stainless-steel internal assembly is designed to provide a robust core inside the lightweight aluminium-alloy body.
A bike lock is not just a bike lock.
ULAC is a Taiwanese bicycle-lock brand established in 1982. It began as an original equipment manufacturer producing high-security solutions for global industry leaders, then transitioned to an independent, consumer-focused brand in 2015 with the Si Works silicone lock collection.
ULAC develops security products through its in-house U-Lab research and development centre and operates its own manufacturing facility. Its work includes integrated alarm systems, NFC smart-lock technology and biometric authentication, alongside conventional bicycle-lock hardware and design-led products.
