Mathtoxyz Motorcycle Lock Rechargeable, 120dB Alarm Disc Brake Locks Anti-Theft Security Wheel Disc Lock
Quick take
This rechargeable disc brake alarm lock uses built-in sensors to trigger a loud 120dB alert if the bike is moved. It is waterproof and designed for motorcycles and other disc-brake bikes where the disc (rotor) has holes and fits the stated thickness range. The biggest buying caveat is compatibility, the lock only fits certain disc sizes and hole patterns.
Pros and cons
Pros
- Rechargeable design with USB-C charging (no frequent battery swapping).
- 120dB alarm system with shock or movement-triggered sensing.
- Waterproof construction for outdoor parking situations.
- Comes with keys and a reminder cable to help you notice the lock is in place.
Cons
- Fit is limited to disc brake rotors with holes and below the stated thickness limit.
- No remote control included, so you unlock with the key to silence the alarm.
What buyers think
Buyer-review evidence is generally consistent on a few product-relevant points: the alarm is described as very loud and sensitive, and the lock is reported to engage properly on disc brakes for compatible bikes. Several reviews also highlight that the lock feels compact and sturdy, and that charging and setup are straightforward enough to use regularly. Review evidence is too limited to confidently generalize about long-term battery health beyond the charging and standby claims, but the overall sentiment supports that the lock works as intended for alarm activation, fit, and usability.
How this rechargeable alarm disc lock works
This is a disc brake lock with an integrated alarm. The lock is activated by pressing the alarm lock button, and after a short delay it confirms activation with a beep. If the bike or wheel is moved while locked, the built-in sensors can trigger the alarm.
To stop the alarm, you’ll use the key to unlock it. If you leave it for a bit, you can also silence it by unlocking with the key after an additional interval, which is useful to know if the alarm goes off while you’re still figuring out your gear.
Charging and battery life: what to expect
The lock charges quickly via a universal USB-C port. A full charge takes about 1.5 hours, and the manufacturer claims a standby window of roughly 2 to 3 months once fully charged.
That standby timeframe is most relevant for riders who do not commute every day. If you park and ride frequently, treat the lock like any other rechargeable device, charge it as needed and plan to top it up before longer stretches of non-use.
Fit and compatibility: make sure it matches your rotor
This lock is intended for disc brake motorcycles and bikes, including mopeds, scooters, mountain bikes, and e-bikes, as long as your rotor meets the stated requirements: the rotor must have holes and be under 7 mm (about 1/4") thick.
Before buying, double-check your rotor thickness and whether the lock can seat on the disc where it can engage. If your disc has no holes or is thicker than the stated limit, you may not be able to secure the lock properly.
Waterproof design for real-world parking
The lock is described as waterproof, which matters if you park outside or at an apartment where the bike may be exposed to rain and weather. While waterproofing helps, it is still smart to keep the lock charged and avoid leaving it in harsh conditions longer than necessary.
Pros and cons summary for shoppers
When it makes sense
- You want added deterrence beyond a plain disc lock, with a loud 120dB alarm.
- You prefer rechargeable hardware over swapping batteries.
- Your bike uses a disc rotor that matches the hole and thickness requirement.
- You park outdoors and want a waterproof lock body.
Who should consider alternatives
- If your rotor does not have holes or is thicker than 7 mm, this may not fit.
- If you want remote fob convenience, this option does not include remote control.
- If your priority is maximum physical security, consider pairing deterrents, since no alarm-only device replaces robust physical locking.
Is it worth it?
For the right bike, this rechargeable 120dB disc brake alarm lock can be a practical “grab-and-go” security add-on. The loud alarm and sensitivity are a recurring theme in buyer feedback, and the rechargeable USB-C approach reduces maintenance hassle. The main reason not to buy is simple, ensure your rotor thickness and hole pattern meet the stated fit requirements, otherwise you may not get a reliable lock engagement.
FAQ
Does it have a remote to silence the alarm?
No. Remote control is not included, and you use the key to unlock and silence the alarm.
How long does it take to fully charge?
Charging time is about 1.5 hours for a full charge.
How long will it last on standby after charging?
The manufacturer’s claim is approximately 2 to 3 months of standby use once fully charged.
Will it fit any motorcycle or scooter with a disc brake?
It is intended for bikes with disc brakes where the rotor is less than 7 mm thick and has holes. Rotor fit is a key requirement.
Is it waterproof?
Yes, it is described as waterproof for outdoor use.
What’s included in the box?
Typical contents include 1 alarm disc lock, 2 keys, 1 hex key, a 1.5 m reminder cable, and a carry pouch.
Is an alarm lock enough to prevent theft?
An alarm disc lock is mainly a deterrent. For better security, many riders use additional physical locking, especially if a thief has time to attack.
Specifications
| Product Title | Motorcycle Lock Rechargeable, 120dB Alarm Disc Brake Locks Anti-Theft Security Wheel Disc Lock Waterproof with 5ft Reminder Cable and Carry Pouch for Motorbike Bike Scooter |
|---|---|
| Category | Automotive > Motorcycle & Powersports > Accessories > Electronics > Alarms & Anti-Theft |
| Brand | Mathtoxyz |
| Manufacturer | Mathtoxyz |
| Model Number | MXCS-Yellow |
| Mfr Part Number | MXCS-Yellow |
| Compatible Devices | Motorcycles, mopeds, scooters, mountain bikes, and e-bikes with disc brakes |
| Audible Noise | 120 Decibels |
| Includes Remote | No |
| Noise Level | 120 Decibels |
| Remote Control Included? | No |
Available variants
Color
- Yellow
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