11 Best Bike Alarms 2021 Review

If you live in an area where bike theft is common, bike security is crucial. Installing a bicycle lock with alarm is one of the best ways to deter would-be thieves and keep your bike safe.

Sadly, bike theft is common everywhere. In the United States, more than 188,500 bikes are reported stolen every year.

Fortunately, there are many devices that you can use to avoid falling victim to theft. Bicycle alarm systems are a good example.

So, we’ve rounded up some of the best bike alarms that you could compare to find one that fits your budget and security requirements. Read them below.

Best Bike Alarms Review

Bordo Alarm 6000/90

Bordo Alarm 6000-90

The Bordo Alarm 6000/90 is a folding lock that’s made of pieces of hardened steel bars (5 millimeters), which are tougher, stronger, and more flexible. To prevent damaging your bike’s paintwork, it’s enclosed in extra soft casing.

The hardened steel bars are linked with the ABUS Link Protection Shield rivets. These special rivets are prized for their flexibility and resistance to sawing attempts.

The Bordo Alarm 6000/90 is also equipped with “3D Position Detection” sensors, which are capable of detecting movements and vibrations in all three dimensions then sets off an alarm. The alarm volume isn’t the loudest (rated at 100 decibels for 20 seconds), but it’s enough to keep thieves away from your bike.

The upside is it doesn’t produce ear-shattering sound with the slightest movements, like when a ball bounces near your bike. It just gives off a soft warning beep at the start.

If you’re going to park your bike outside overnight, and you live in a big city, the Bordo Alarm 6000/90 can’t do the job alone. But for light to moderate security situations, like going on a quick trip to the store or stopping for a coffee break, it would make a great main—and possibly only—security lock.


  • Stays on the bike most of the time
  • Produces a loud and piercing sound
  • Covered with rubberized material that won’t scratch your bike
  • Not easy to pick


  • Tough to tug the end out
  • Can be heavy


Wsdcam 113dB Anti-Theft Bicycle Motorcycle Alarm

Wsdcam 113dB Anti-Theft Bicycle Motorcycle Alarm

If you’re on a tight budget, the Wsdcam 113dB Anti-Theft Bicycle Motorcycle Alarm is an affordable alternative to the Bordo Alarm 6000/90. For the low price, it has all the features you need to keep your bike secure for a couple of minutes or even hours.

You don’t want to arm it all the time, unless you intend to leave it outside for a good while, because it’s going to disturb everyone near it. This device is super loud. The alarm sound is rated at 113 decibels, which is like listening to live rock music.

The Wsdcam 113dB Anti-Theft Bicycle Motorcycle Alarm also has a vehicle search function, which has three ringtones. Just disarm it then press the “bell” button to choose the ringtone you like.

One of the highlights of this bike motion alarm is its SOS function. This function will immediately set off the alarm if you need help whenever your bicycle or motorcycle tilts over 45 degrees. (This function is disabled if the alarm is in default mode.)

It works perfectly in cold and hot weather situations, as long as the temperature is within -4ºF to 140ºF. Exposing it to light to moderate rainfall for a short time won’t cause it to malfunction.


  • Definitely loud enough to stop a thief from stealing your bike
  • A “sensitive” bike alert device
  • Doesn’t require a lot of effort to install
  • Small enough that you can place it anywhere on your bike


  • A few complained that it doesn’t go off easily and consistently
  • May not offer years of service


G Keni Bike Tail Light Rechargeable, Anti-Theft Alarm

G Keni Bike Tail Light Rechargeable, Anti-Theft Alarm

The G Keni Bike Tail Light Rechargeable, Anti-Theft Alarm makes you feel like you’ve just bought a car alarm. It blasts away an excruciating alarm sound that reaches up to 120 decibels—just five decibels louder than a chainsaw.

It’s not the brightest tail light. However, it still offers plenty of light, with a 180-degree illumination. There are three flashing modes that you could use to keep you and your bike safe: steady, slow blink, and fast blink.

The remote control has a reach of 164 feet, making it easier for you to find your bike (by light and sound) or sound the electric horn from far away. The buttons of the remote are tactile, so you can easily feel the button you need, without looking at it.

The built-in lithium battery has a capacity of 700mAh, which can last up to 15 hours (if flash mode is used) or 15 days (average use). There are different ways you can charge it for 2 to 3 hours, such as a car charger, USB adapter, power bank, etc.


  • A loud anti theft device for bike
  • Not bulky and heavy (86.2 grams)
  • Have different flashing modes to help you find or check your bike from a distance
  • Will easily go off


  • Plastic hardware, except for the screws
  • Not built for the extreme cold weather


Bibowa Disc Brake Lock with Alarm

Bibowa Disc Brake Lock with Alarm

The Bibowa Disc Brake Lock with Alarm is extremely annoying, at least for a would-be thief. It’s sensitive, loud, and built to resist most cutting and chisel attacks.

It works almost in the same way as other disc locks with a reminder cable:

  • The device produces a loud beeping sound to let you know the alarm is active.
  • Then, when someone touches the device or moves the bike, the tip/vibration sensor lets out a warning beep.
  • If the vibration or movement continues, it automatically raises the volume to medium level.
  • It creates an even louder sound (up to 110 decibels) on the third vibration to catch your attention or other people in the area.

No bike security system is perfect, including this one. But with the combination of its loud alarm sound and strong alloy steel body with an anti-drill core, no sane thief would stick around to mess with your bike.

It’s waterproof. So, a little rain or spray of water wouldn’t hurt it.

All in all, the Bibowa Disc Brake Lock with Alarm is a good deterrent. It’s a suitable option for a wide variety of open motor vehicles of any brand, including motorcycles, racing bicycles, and scooters, as long as they have a disc braking system.


  • Comes with a carrier case for the bicycle security alarm
  • Produces a high-pitched and loud beeping sound
  • Not heavy or bulky
  • Sensitive to vibrations, with three levels of warning sound volume


  • May feel and look cheap for some people
  • Sets off even with the slightest movements


JACOOL Disc Brake Alarm Lock 110dB

JACOOL Disc Brake Alarm Lock 110dB

If you’re looking for a supplemental alarm disc lock, the JACOOL Disc Brake Alarm Lock 110dB is a reasonable choice. It’s tough, easy to use, and an effective deterrent.

A simple press of the locking mechanism is all you need to activate the alarm mode. When it senses a vibration, it produces a series of three beeps to let potential thieves know your vehicle is armed. If the vibration continues, it sets off a continuous and piercing sound (110 decibels) for a good 10 seconds.

It comes with an orange reminder cable that’s 4 feet long, so you don’t forget to remove the disc lock before riding away. Other items included in the package are a black carry bag, 12 zinc button batteries (6 backups and 6 pre-fitted), mini wrench, and lock keys.


  • Loud enough to focus the attention on the thief
  • Seems sturdy for the price
  • Sensitive to movements (but not too much)
  • Includes two packs of batteries that can last for months


  • A louder warning sound would be nice
  • Relatively heavy for its size


MYSBIKER Motorcycle Alarm Disc Brake Lock

MYSBIKER Motorcycle Alarm Disc Brake Lock

Affordable, easy to use, and effective anti theft bike alarm! The MYSBIKER Motorcycle Alarm Disc Brake Lock is a great option if you feel the need for extra security for your prized bicycle, motorcycle, or scooter.

Once locked and armed, it produces three continuous beeps to tell people with bad intentions to pick another bike to mess with. If that still doesn’t stop them, it lets out a loud alarm sound, which can reach up to 110 decibels, for 10 seconds.

The MYSBIKER Motorcycle Alarm Disc Brake Lock is made of forged stainless steel, making it ideal for use in harsh outdoor environments. It’s not waterproof, but it still functions well when it’s under the rain or soaked in water for a brief period.


  • An affordable and effective bike security alarm
  • Sensitive and loud enough to warn you that your bike is being touched
  • Makes a loud beeping sound when the device is active
  • Dependable and well made for the price


  • Would be nice if it has a longer alarm sound
  • A few people say it’s too sensitive


Dowco Guardian 26038-00 Integrated Motorcycle Cover Security Alarm System/Theft Deterrent

Dowco Guardian 26038-00 Integrated Motorcycle Cover Security Alarm System=Theft Deterrent

The Dowco Guardian 26038-00 Integrated Motorcycle Cover Security Alarm System is a no-frills product, yet it does the job well. No confusing multicolored wires to setup or special tools required for installation.

It’s so simple to use that you can just drop it into the sewn-in pocket of your bike cover or tether it to your bike. Then, clip it to the fork or wheel. That’s it.

It’s almost impossible not to hear this. When your bicycle or motorcycle moves, it can unleash a warning sound that’s 10 decibels louder than a police siren. (The Dowco Guardian 26038-00 is rated at 130 decibels.) The only way for a thief to silence it is by taking out the battery, inserting the pin, or worse, destroying it.


  • Makes an extremely loud sound for its size
  • Easy to install and use
  • Works perfectly well for what it’s intended for
  • Has a durable nylon cord and belt clip


  • Can’t easily remove the battery since it’s screwed in place
  • Doesn’t have a built-in shutdown timer


Nulock Keyless Bluetooth Bike/Motorcycle/Gate Lock IP44 Splash-Proof

Nulock Keyless Bluetooth Bike/Motorcycle/Gate Lock IP44 Splash-Proof

Like what the name hints, the Nulock Keyless Bluetooth Bike/Motorcycle/Gate Lock doesn’t need a remote control to function. All you need is your smartphone or any Bluetooth-enabled device and download the app, which locks/unlocks the device, notifies you of the battery life and Bluetooth connection status, and activates the vibration alarm.

On the app, you can activate the vibration alarm by turning the ‘On Vibration’. With a simple shake or movement of your bike, the Nulock will blast 110 decibels of sound alarm for a minimum of 30 seconds.

Its IP44 rating means it’s protected against water splashing from different angles. The cable is covered in dark-tinted transparent vinyl to protect the 47-inch braided steel cables from rust and clipping. (Each of the 7 braided steel cable consists of 19 more braided steel for greater strength.)


  • Lighter and less bulky than a big U-lock
  • Automatically unlocks if it’s within your Bluetooth range
  • Can unleash an ear-piercing siren
  • No need for a key


  • Directions are poorly put together
  • Has a thin lock cable


Oxford Black Alarm-D Max Duo

Oxford Black Alarm-D Max Duo

When buying bicycle alarm lock, always look for the Sold Secure logo, which proves that a product provides the highest level of security. The Oxford Black Alarm-D Max Duo has a Sold Secure Silver rating, thanks to its 120-decibel earsplitting alarm.

As a Silver-rated lock, the Oxford Alarm D Max Duo can protect your bike from a more determined thief, who has a wide range of tools, for three minutes. However, this doesn’t mean you can just leave your bike for an extended period of time, especially in areas where bike theft is common.

This weatherproof alarm lock is powered by a lithium battery. It comes with an extra cable that you can use to keep your wheels secured to the frame.


  • Fits perfectly on most bikes
  • Heavy lock and thick cable
  • An adequately sensitive and loud security alarm
  • Sold Secure Silver certified


  • Might be too big and heavy
  • D-lock wouldn’t fit through the frame and wheel


Wsdcam Bike Lock Alarm with Remote Universal Security Alarm Lock System Anti-Theft Vibration

Wsdcam Bike Lock Alarm with Remote Universal Security Alarm Lock System Anti-Theft Vibration

The Wsdcam Bike Lock Alarm with Remote Universal Security Alarm Lock System is a good form of security device, as long as you can park your vehicle in low-risk to moderate-risk bike theft areas. It deters thieves from targeting your bike by a 110-decibel alarm. It has three levels of sensitivity that you can experiment with.

It has the features that are commonly found in a bike security system within its price range, such as a remote control, PVC-coated cable, stainless steel braided cable, IP55 waterproof rating, vehicle search function, etc. Plus, it has a 4-digit combination lock that gives you the freedom to choose up to 100,000 number codes.


  • Relatively simple to use and secure
  • A versatile theft alarm device
  • Alarm sound stops after a few seconds or can be turned off
  • Will easily set off


  • Has a short cable
  • Not completely waterproof


Oxford OF3 Boss Alarm Disc Lock with 100dB Audible Warning

Oxford OF3 Boss Alarm Disc Lock with 100dB Audible Warning

The OF3 Boss Alarm Disc Lock is considered Oxford’s “strongest lock.” It even has the seal of approval of Thatcham Research, a UK-based non-profit research center that has the most rigorous safety testing in the world.

This giant padlock can last a long time in extreme temperatures and weather environments, including heat, frost, and rain. It’s not extremely loud, though, if we compare it to the other bike alarms in our list. It produces an alarm sound level of only up to 100 decibels.

The new design features a longer shackle, so you have the option to use it as a padlock with a chain or a disc lock. It already comes with free batteries and Oxford’s Minder Cable, which serves as your visual reminder of whether your vehicle is still locked or not.


  • Decently loud and sensitive
  • Not too bulky or too small
  • Bright color makes it noticeable
  • Has a sturdy lock


  • Doesn’t come with a reminder cable (based on some consumer reports)
  • Armed beep sound is louder than the actual alarm

How to Choose Good Bike Alarms

The biggest mistake you could make is to rush in and buy the first bicycle theft alarm you see. Pause and think hard first about all of the features that you need to consider, so you can find the bike alarm that works best for your needs.

Here are some of the things you should look out for when buying the best bike anti theft locks with alarms.

Sound and Volume

A bike anti theft alarm’s sound and volume are important considerations for obvious reasons. You want it loud, but not too loud that it’ll disturb the whole neighborhood.

The loudness of a bike alarm is measured in decibel (dB). Depending on the location and distance (from your bike to where you plan to be), a 100-decibel rating is often enough. That’s as loud as a boom box or lawn mower.

But don’t hesitate to get a louder bike alarm. The louder the sound, the better it is in scarring off thieves. If you plan to park your bike at a distance that’s too far from where you’ll be, go for an alarm that’s at least 120 decibels.

Another thing you need to think about is the duration of the alarm sound. That could be anywhere between 5 and 30 seconds. Some bike lock alarms have an automatic shut-off sensor, while others need to be manually disarmed by using a remote or a key.

Level of Sensitivity

Most entry-level alarms have some kind of sensor that monitors the movement of your bike around-the-clock. So, if a thief tries to move your bike or remove any of its parts, the alarm springs into action to alert you or passersby.

The problem most people have with bicycle anti theft alarm is it can be too sensitive. It would instantly go off when, let’s say, a soft gust of wind passes by.

Look for an alarm that you can adjust the sensitivity to avoid false alarms. For less than $50, you can already buy one that has at least seven sensitivity levels and three volume levels, so you can set it up however you want it.

Some bike locking systems will give warning sounds at a lower volume. Then it sets off the full alert system, if the initial warning sound doesn’t scare off a thief. Aside from the warning sounds, other “smart” bike alarms will alert you on your smartphone if someone (or something) touches your bike.

Durability and Weather Resistance

Whether it’s worth $20 or $70, there’s no question that a bike alarm should last long enough to get your money’s worth. It should be made from materials that are able to withstand long exposure to harsh weather elements, like rain and snow.

An alarm with an IP55 rating is a good place to start. This means that the device is protected from dust and water projected from different angles.

However, an IP55 rating doesn’t mean it’s waterproof (completely stops water from entering inside the housing). It’s not built for water submersion, heavy rain fall, or high-pressure and heavy sprays of water.

And don’t forget about the batteries. Most bike locks with alarm are powered by batteries, which don’t function well in cold weather. If you plan to subject it to freezing temperatures, consider using cold-resistant lithium-ion batteries, which can still function at minus forty degrees.


Unless you have the time and knowledge, you’d want a bike alarm that you can easily put together and install. No multicolored cables or complicated owner’s manuals to deal with.

How some motorcycle locks with alarms are installed:

  • Clasped to the disc brake (which immobilizes the bike)
  • Fitted on either side of the handlebars

Most of the products we’ve featured in this article is generally simple to install and operate. They don’t have complicated wiring systems that require professional help.

For instance, the Dowco Guardian 26038-00 Integrated Motorcycle Cover Security Alarm System/Theft Deterrent is dropped into the sewn-in pocket of any bike cover then clipped to the fork or wheel. The G Keni Bike Tail Light Rechargeable, Anti-Theft Alarm is mounted to the seatpost. Other models are attached to any stable surface of the bike using the double-sided tape on them.

But a more important consideration is where on the bike you’ll install the motion sensor bike alarm. It needs to be on discrete areas where vibrations or movements are usually felt. That could be anywhere on the bike’s frame, wheels, fork, or under the seat.

Lock Type and Length

Should you get a bike alarm with a cable lock or U-lock? Both have its pros and cons, but in most cases, people choose cable locks because they’re relatively small and lightweight.

Cable lock alarms come in a variety of materials and lengths. A popular option for motorcycle and bicycle security systems is a security cable made from braided steel.

Compared to single-strand steel cables, braided steel cables is more flexible and lighter. The interweaving of individual steel wires tends to make the cable just as strong as a cable made of heavier gauge steel cable.

It’s not going to be easy to cut a braided stainless steel cable. Even if a few strands are nicked, it can still offer good protection against thieves.

The length of the cable is another consideration. In most cases, a length of 2 to 2.5 feet (24 to 30 inches) should be enough. However, there are bike alarms with security cables that can be as long as 3.9 feet (47 inches).

Tip: If you’re unsure about how long the cable should be, get any piece of string or thin rope, and then wrap it or thread it through your bike and where you plan to lock it up (tree, pole, stall, etc.). It’s not completely accurate, but it can give you a good idea of how much you’ll need.

The Battery Life

Are alkaline batteries better than lithium batteries? Should you choose rechargeable batteries or disposable ones? These are just some of the questions you need to answer when buying bike alarm systems. Remember: The right battery will save you money, so choose well.

Let’s start with rechargeable batteries and disposable batteries.

The upside of a rechargeable battery is you don’t need to keep buying extra batteries. Thus, you save money (at least in the long run).

However, it can be expensive upfront. You also need to keep recharging them, which can be inconvenient when you’re always in a hurry. So, it’s always a good idea to bring with you an extra set of batteries, just in case.

Lithium batteries last longer compared to other types of batteries. They’re also great for outdoor devices, such as bike alarms, because they still perform well even in the harshest weather conditions.

The downside of lithium batteries is they’re more expensive. On the other hand, alkaline batteries are less expensive and could last at least six to ten months when in constant use. And since they don’t contain heavy metals, they don’t poison the soil and groundwater.

Remote Control

A remote control offers convenience by allowing you to control the different functions of your bike alarm from a distance. The remote control of many anti-theft bike alarms could work at a distance of 30 to 66 feet (around 25 steps), or even up to 164 feet (around 66 steps).

It also comes in handy when you’re trying to find your motorcycle or bicycle fast. Manufacturers often equip their security alarms with a vehicle search function or answer-back function, which produces a sound or light when you press a button on the remote control to let you find your vehicle right away.

Another cool feature of some remote controls for bike alarms is a button for the electric horn. This makes it a lot easier to alert pedestrians and drivers while you ride through traffic.

Reminder Cable

This is really a matter of preference. If you’re forgetful, a bright-colored reminder cable is truly a must-have.

A reminder cable has a loop on both ends. One of the loops connects to your bike’s handlebar, while the other loop connects to the disc brake. This prevents you from making the costly mistake of riding away while your bike theft alarm is still attached to your disc brake.

Extra Features

Bike alarms have a variety of innovative and useful extra features. For instance, there’s the SOS function, which makes a beeping sound to let others know that you need help. This function usually sets off when your vehicle is leaning towards an angle, like more than 45 degrees from its original position.

That’s just one example. More sophisticated alarms have a GPS tracker and even an emergency SMS texting service.

Your Budget

Typically, the price of a product dictates the quality and features that you’ll get. The same is true when buying bike locks with alarms.

Be prepared to invest more than $60 if you want the best possible security for your vehicle. For that price range, you can get alarms that are made from the most durable materials and packed with innovative features.

That doesn’t really mean thieves won’t be able to cut them. However, they’re most likely going to have a hard time getting them off your bike.

You don’t really need to spend a ton of money to get a bike alarm that works decently. In fact, for $50 or less, you can already get one that has a motion or vibration sensor, loud alarm (100 decibels or higher), wireless remote with a good range, bike finder function, and an adjustable sensitivity and volume.


The best bike alarms featured in this article serve only as a deterrent. They’re not the best options if you plan to leave your bike outside for hours, and you’re not within hearing distance.

To be fair, there’s really no single device that can absolutely protect your bike from theft. A crafty and experienced thief can disarm bike lock alarms fast, without anyone even noticing it.

Look for other ways to increase your bike’s security. For better results, combine your bike alarm with other anti-theft devices for bikes, such as a GPS tracker and thick cable lock.

Overall, bike alarm locks are one of the best things you can buy for your bike and your peace of mind. They’re affordable, handy, easy to use, and efficient for their intended use.