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🔐 Lock it. Alarm it. Own the street with confidence.
The Mathtoxyz Motorcycle Alarm Disc Brake Lock combines a powerful 110dB alarm with waterproof aluminum alloy construction, ensuring robust theft protection for motorcycles, scooters, and e-bikes. Featuring smart sensor technology to eliminate false alarms and compatibility with disc brakes up to 7mm thick, it comes complete with keys, a reminder cable, and a carry pouch—perfect for urban riders who demand reliable, all-weather security.











| ASIN | B08W1H4QXL |
| Audible Noise | 110 db |
| Best Sellers Rank | #6,076 in Automotive ( See Top 100 in Automotive ) #3 in Powersports Alarms & Anti-Theft |
| Brand | Mathtoxyz |
| Compatible Devices | Motorcycles |
| Customer Reviews | 4.6 out of 5 stars 3,628 Reviews |
| Manufacturer | Mathtoxyz |
| Maximum Range | 15 meters |
| Mfr Part Number | MA-CS-B |
| Model Number | MA-CS-B |
| Noise Level | 110 db |
| Number of Items | 1 |
| UPC | 887511762463 |
| Unit Count | 1 Count |
M**K
Such a sneaky and effective little lock - I love it! Red, so u can see it!
What a great theft deterrent device for under $20! AND it has an alarm that is LOUD! It may not be rechargeable, but you CAN replace the battery. This is why it came with that little Allen wrench! I was wondering.........had to come back to the product page and try to figure it out. My LECTRIC E-Bike now has FOUR locks! Where I live, there are NO bike racks to lock to. So I got a U-lock, a cable that goes with it, and the folding lock that came with the bike. Now, I have this fourth lock, a type of lock I never even knew existed until I went looking, and I feel a lot more confident now about leaving my $$$$$ bike outside the store. That monster is HEAVY! It's like a freakin' motorcycle! And now, I feel a lot safer, and freer! Lock is very easy to use; remove the little white rubbery cushion, throw it out. Remove the Allen wrench, it was stuck into the cushion. ;-) Keep it. Simply insert key to unlock and when you see it is unlocked, clip it onto your disc brake, and push the same silver button (where the key fits) down; it IS the locking part. You'll heart it beep twice. Any movement after that, and it's going to set that loud alarm off! To stop the alarm, you have to use the key to unlock it, or wait it out 30 LONG ear blasting seconds! I love that I got the red one, so it can be seen, a visual deterrent! It functions so easily, I love this style of lock! It comes in other colors too, yellow, for instance, highly visible, and says to a bike thief, "BACK OFF!" Its appearance is as you'd expect; Fits into the palm of your hand, or into the little velcro pouch it came with. I cinched mine up near the handlebars. Also, it comes with a long cord, so you can attach one end to the lock and the other end to your handlebar, so you don't forget to unlock it,, and try to drive off, and wreck your wheels. Be safe, wear a helmet!
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!
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!
F**O
Good
Good product I forgot to read that it's not rechargeable
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.
W**Y
Loud
Makes me feel better about parking it in the carport
J**A
Durability and Safety
It work great, It is Durability, great Sensitivity,Material good
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
شكرا للبائع كما بالوصف
كما بالوصف
A**O
Fatto bene e funzionante
Fatto bene e funzionante, il prodotto si presenta robusto e ben fatto facile da utilizzare.
S**M
Pas trop encombrant et bien pensé
À date ça fait bien comme alarme et pas trop dispendieux
Y**F
Happy very happy
Definitely worth buying I’ve bought 3 and happy with every single one of them very loud very easy to carry and easy to use
M**A
Buon prodotto, robusto
Finalmente un buon prodotto economico ma funzionale e comodo
Trustpilot
2 days ago
1 month ago