Motorcycle
Motorcycle Disc Brake Alarm Lock — 110dB Anti-Theft Device
4.8/ 5
- 5 11
- 4 1
- 3 1
- 2 0
- 1 0
Brand Mathtoxyz
Product review
What you get: one alarm-equipped disc brake lock (batteries installed), two keys, one hex (Allen) wrench, a 1.5 meter reminder cable, and a padded carry pouch.
Construction and weather resistance: The lock housing is crafted from aluminum alloy to resist corrosion while keeping weight manageable. The unit is designed to be water-resistant so it can stand up to rain and outdoor parking. The alarm runs on a replaceable battery for straightforward maintenance.
Alarm and sensors: Built-in impact and motion sensors trigger a 110dB siren to draw attention to tampering. To engage the device, press the lock button — an audible beep after a few seconds confirms activation. To stop the alarm, unlock it with the key; the alarm will also cycle off after a short interval if left sounding.
Compatibility: This disc lock works with most motorcycles, mopeds, scooters, mountain bikes, and e-bikes that have a disc rotor under 7mm (about 1/4 inch) thick and featuring mounting holes that align with the lock pin.
Use and upkeep: Fit the lock through a rotor hole and secure with the key. Keep the included hex wrench handy — it’s supplied for convenience and storage — and carry the reminder cable to avoid riding off with the lock attached. Replace the battery when needed to maintain alarm reliability.
Pros
- Loud 110dB alarm and motion detection
- Durable aluminum alloy and water-resistant
- Includes keys, hex wrench, reminder cable and pouch
Cons
- Sensitive sensor can produce false alarms in windy areas
- Requires manual battery replacement
- May be awkward to mount quickly for some users
VerdictA compact, rugged disc brake lock that combines a loud 110dB alarm and motion sensors with a durable aluminum alloy body. Easy to fit on most bikes and scooters with rotors thinner than 7mm that have bolt holes. Replaceable battery and included accessories make it practical for everyday use.
Reviews
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Argy Da Pogi 5/5
Does what it should
Looks sturdy and performs its job. Not flashy, but effective.
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steve the pants reviewer 5/5
Fun gift, impressively loud
Got one for my stepdad and we had to test it a bunch. The alarm is intense — very noticeable and sharp at 110dB.
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Chanan-Yah B. 5/5
Simple and exactly what I searched for
It fits my needs, but I’m not sure how you recharge it — the battery replacement detail isn’t obvious to me.
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Marco Russell 5/5
Still going strong after a year
I’ve used it for over a year with no problems. It works reliably, though wind or a strong blower nearby can trip the sensor. It would be nice to dial sensitivity, but overall it’s been consistent and dependable.
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BSooner 5/5
Solid secondary lock for several bikes
We use these as a second lock on our e-bikes. The alarm and the fact it prevents wheel rolling are big plusses. We’ve got them on four bikes and they’ve been reliable.
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Molly A. Block 5/5
A compact alarm that gives me confidence
I added this to my electric bike’s security lineup and it fills a gap I didn’t know I had. The lock is surprisingly solid and noticeably heavy — a reassuring weight. It came with the little Allen key tucked into the foam, which I almost tossed. Setup was simple: insert the lock through the rotor, and the alarm engages after the confirmation beep. I keep multiple locks on my bike where there are no racks, and this disc alarm has made me feel a lot safer leaving it outside for short stops.
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Sans nom 5/5
Compact design that works
Not too bulky, thought through, and so far it’s performed well without costing a fortune.
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Ahmed 5/5
Quick thanks — as described
Thanks to the seller, the item arrived as described and works fine.
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Liv1163 3/5
Not the quickest option for fast stops
It takes time and some kneeling to line up the hole and secure it. If you need a lightning-fast lock/unlock, this isn’t the most convenient for quick errands.
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Mari Carla 5/5
Added peace of mind for daily riding
Bought it to give my mother extra protection on her motorcycle. The alarm is loud when activated and the unit feels well built. The reminder cable is handy so you don’t forget the lock is still on. Easy to use with the key and gives a useful extra layer of security.
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Wiremu Yate 5/5
Reliable alarm, well worth the buy
Sturdy construction and solid alarm calibration. It doesn’t trigger for small breezes but responds when the bike is actively moved. Installation was straightforward and it provides reassuring protection.
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Syler Cider 4/5
Sensitive and useful, could be louder
The sensor is very responsive — I often trigger it while trying to remove it — which is good for theft deterrence. The alarm is audible nearby on quiet streets but can be hard to hear over regular traffic from a distance. I use this as one layer among several locks and tracking devices.
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Antonio 5/5
Well made and functional
Robust feel and works as advertised. Easy to operate.
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