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🔒 Lock it. Alarm it. Own the street with confidence.
The Mathtoxyz Alarm Disc Lock combines a powerful 110dB alarm with smart shock sensors and durable waterproof aluminum alloy construction. Designed to fit most motorcycles and bikes with disc brakes under 7mm thick, it offers professional-grade security with easy one-button activation and replaceable batteries. Perfect for urban riders seeking reliable, high-impact theft protection that stands up to all weather conditions.










| ASIN | B08W1H4QXL |
| Audible Noise | 110 Decibels |
| Best Sellers Rank | #6,681 in Automotive ( See Top 100 in Automotive ) #4 in Powersports Alarms & Anti-Theft |
| Brand | Mathtoxyz |
| Compatible Devices | Motorcycles |
| Customer Reviews | 4.6 4.6 out of 5 stars (3,544) |
| Includes Remote | No |
| Manufacturer | Mathtoxyz |
| Maximum Range | 15 Meters |
| Mfr Part Number | MA-CS-B |
| Model Number | MA-CS-B |
| UPC | 887511762463 |
| Unit Count | 1 Count |
P**S
It cheap and it works! What more do you need to know?
A group of cockroaches tried to steal my bike and because of this cheap $20 thingy it was left. They actually broke the ignition cylinder and turned on the bike. As you can see in the pictures they hammered away and couldn’t get it off. This strong sensitive alarm is worth more than this. Comes with a storage pouch that can be used while mobile, It’s easy to install, and secured my boobie! It has a loud and super sensitive alarm (which can be annoying on rainy and or windy days). It worked for me. Definitely getting another. Thank you!!!!
C**N
Great for disc brakes
Great product for anyone that has disc brakes on their bike or motorcycle. Not only will it slow down a thief or stop them but it also has an alarm on it to draw attention. The alarm is very loud and very annoying. The alarm is very sensitive. It gives a little warning beep and then goes completely off so doesn't just go off immediately if somebody bumps into it. It fits perfect on my electric bike. Easy to use
R**N
Works Awesome
Love this alarm. Its loud and works just as good as the HD name brand for half the cost. Wish I seen it sooner and could have saved some money for sure.
S**S
Works well, but only on thinner discs
Nice product, work well on my dual sport and dirt bike, but it won't fit my street bike. My disc is less than 7mm, but it still won't fit. Seller says it will fit discs up to 7mm thick.
Z**A
Excellent Gift - Very Satisfied
I bought this disc brake lock with alarm as a gift, and they loved it. It feels strong and well-made, and the alarm is loud enough to provide peace of mind. It’s easy to use and fit perfectly. They were very satisfied with the product and the security it offers. Definitely a great gift option!
A**Y
Peace Of Mind
This motorcycle alarm disc brake lock is an absolute must-have for any rider! It’s solid, heavy-duty, and gives me total peace of mind when I park my bike anywhere. The metal construction feels strong and durable, and it fits perfectly on my brake rotor without any hassle. The alarm is loud—seriously loud—which is exactly what you want to scare off anyone messing with your bike. It’s super easy to use: just lock it on, and it automatically arms itself. I’ve used it in all kinds of weather, and it’s held up perfectly. For the price and the protection, you just can’t beat it. Highly recommend this lock to every motorcycle owner who wants that extra layer of security and peace of mind!
S**.
Definitely worth the price.
my 2019 Harley Davidson St. glide has a security system already but sometimes we park our bikes and some not so great places to sensitivity is good. The quality seems great easy to install. I love the color matches my bike for the price, very great value and quality I cannot complain. The lock quality seems well.
L**3
not as manageable as I would have liked.
For me, this kind of lock isn't a fast action to lock my bike, if you have knee or back problems, you will be on the ground for a while trying to line up a hole with the lock and then securing it. When I'm out and about, if I want to leave in a hurry, the process of locking and unlocking are too difficult for me, it seems like a good lock, but in this day and age, speed is a preference with my security.
A**D
كما بالوصف
C**E
My Personal Review – Great Motorcycle Alarm! I recently got this motorcycle alarm, and I have to say, it’s worth every penny. The build quality is solid, and it doesn’t feel cheap at all. One of my biggest concerns with alarms is false triggers, but this one is well-calibrated—it won’t go off with small bumps or wind, yet it reacts instantly when the bike is actively moved. The sound is extremely loud, which is exactly what you want to deter thieves. Installation was straightforward, and it gives me peace of mind knowing my bike is protected. If you’re looking for a reliable and effective security solution for your motorcycle, I highly recommend this alarm!
A**O
Fatto bene e funzionante, il prodotto si presenta robusto e ben fatto facile da utilizzare.
S**M
À date ça fait bien comme alarme et pas trop dispendieux
M**A
Finalmente un buon prodotto economico ma funzionale e comodo
Trustpilot
1 month ago
3 weeks ago