Are you looking for an alternative method to the traditional chain and lock to protect your bikes? Then the solution for you could be the sound alarm if you do not know which anti-theft to choose for your bike.

Take a look at our guide that provides you with some useful information and compares the prices and reviews of the models in the ranking below, they are among the best sellers and appreciated on the market.

Right here are the best bike alarms with the latest and advanced features that are listed below.

RANK NO. 1
SuperInk 2 Set Wireless Motorcycle Bicycle Bike Anti-Theft Burglar Vibration Security Alarm Waterproof Adjustable Volume Super Loud 113dB Remote Control Bell
  • Vibrationally triggered alarm suitable for Bikes, Motorcycles, Doors or Windows
  • 7 level adjustable sensitivity from gently touch to push or bea
  • Adjustable Volum from 96dB, 105 dB to 113dB,detering thieves effectively.
  • Easy to find your vehicles by 6 kinds of bells with IP55 waterproof pc material shell
  • Installation by pasting with double-sided sticker or tieing it with strap
RANK NO. 2
YOHOOLYO Disc Lock Alarm Motorcycle Alarm Padlock with 110db Alarm Sound for Motorcycles Bicycles
  • The Anti Theft Lock is made entirely of metal, it is sturdy and durable
  • The alarm sound is able to reach to 110 db, the measure of the locking pin 7 mm that allows us to set at 360 degrees, and it is possible to fix it in any position
  • It comes with two keys, it is ideal for motorcycles, bicycles, scooters and any vehicle where there are holes or spokes on a wheel
  • Motion sensor with 5 seconds delay and rust-resistant, weather-resistant, resistant to destroy physical and waterproof
  • The package is included 1 motorcycle Disc Lock 2 keys and 1 allen key ,you can use the supplied allen key to unscrew the 4 screws in the back of our lock
RANK NO. 3
Crystal Vision SHBLA Weather Proof Anti Theft Loud 130db Alarm 14mm Heavy Duty Bike U Lock with Mount Holder. Auto Arm & Disarm, Alarm Lock, Siren Lock, Bike Alarm Lock, Road Bike,Mountain Bike
  • Super Loud Alarm: Vibration, Breakage, disassembly and cable clipping triggers alarm automatically at 130 DB
  • Strong and Durable: This brake lock is constructed with forged stainless steel and is secured with a 14 mm Quattro-locking, carbide-reinforced hardened-steel locking pin. With waterproof function
  • All Weather Proof: Operates in temperatures between -14 to 140 Fahrenheit
  • Long Life Use- 1yr battery life (battery included), require cr2 battery.
  • Premium Holder- ADJUSTABLE: The bracket is suitable for the bicycle ellipse frame tubing from 1.5 inch to 3 inch. Holds the lock firmly in place
RANK NO. 4
Garmin Varia RTL515, Cycling Rearview Radar with Tail Light, Visual and Audible Alerts for Vehicles Up to 153 Yards Away, 010-02376-00, One Size
  • Rearview radar with tail light provides awareness of vehicles approaching from behind up to 153 yards (140 meters) away
  • Pairs seamlessly with your Edge bike computer and compatible smartphone as well as select Garmin wearables or the radar display unit
  • When used with your compatible smartphone, the Varia app provides graphics — plus tone and vibration alerts — that indicate approaching cars
  • When used with a compatible smartphone, Varia radar integrates with third-party apps such as Ride with GPS to overlay your maps with rearview radar alerts
  • Daylight visibility up to 1 mile alerts motorists to your presence as soon as possible
RANK NO. 5
YOHOOLYO Disc Brake Lock, Anti-Theft Motorcycle Motorbike Alarm Disc Lock, 110dB Alarm Sound and 6mm Pin Bonus Carry Pouch
  • ✚Make Thieves Fear Alarm System➤Alarm Disc Lock is a practical solution for bikers to protect their beloved motorbikes or bikes while parking outside or at home.Up to 110db alarm will automatically activate upon sensing any vibration or shock,keeps your belongings safe and enough to scare most thieves away
  • ✚Crash-resistant And Waterproof ➤This disc brake lock is constructed with forged stainless steel and easy to lock with one-press operation,just push down the button with a“Beep”sound into alarm status.With waterproof function,keep working in rainy days and never get rusty.
  • ✚Portable and Sensitive Alarm Lock➤Portable in size but loud in voice, the motorcycle disc alarm is more sensitive.You will hear the alarm immediately when some cunning thief approaches
  • ✚Durable Batteries Plus Carry Pouch➤ 6 internal batteries and 6 back up for longer use. An Allen key to disassemble the lock and carry pouch for storage included.3 pcs security keys for every different lock with well-packed box.
  • ✚Wide Application Range Disc Lock➤YOHOOLYO disc brake lock fits for various vehicles with up to 6mm disc brakes: motorcycles, electromobile, bicycle, motorbike,scooters etc.Such as:Ducati,Harley,Aprilia, BMW, Buell,Honda, Kawasaki,Suzuki, KTM,Triumph and Yamaha,Moto Guzzi,etc
RANK NO. 6
KCMYTONER 1 Pack Adjustable Volume 113 dB Wireless Anti-Theft Vibration Waterproof Security Cycling Bike Alarm Motorcycle Bicycle Alarm with Remote Control-New Version
  • 【Multi-application】Can effectively prevent theft of bicycles. Vibrationaly triggered alarm suitable for bicycle, motorcycle, electric bike, electric scooter and so on.
  • 【7 level djustable sensitivity 】7 level adjustable sensitivity from gently touch to push or beat, you can easily set it according to your need. Wireless remote control operation, easy to use, remote control range up to 20M/66FT.
  • 【 Adjustable Volum and SOS function】Deterring thieves effectively by 113 dB loud alarm, adjustable Volum from 96dB, 105 dB to 113dB; It can sound SOS remind other for help when the accident was happened.
  • 【Easy Installation and Waterproof】Easy install, two install method: paste with double-sided sticker or tie it with strap. IP55 Waterproof, suitable for outdoor.
  • 【Exquisite design】Item Size:3.7"*1.6"*0.8" inch,6 kinds bell sound can operate by remote control, easy to find the vehicles position. Batteries: 3pcs AAA batteries for the host.(Contain) 1pcs 27A battery for the remoter.(Contain)
RANK NO. 7
Bike Light Set Anti-Theft Alarm Bicycle Front & Tail Light, Rechargeable Waterproof Cycling Lights, Bicycle Front Light with Loud Sound Siren, 3 Lighting Modes 5 Modes Sound, Fits Mountain Road Bike 
  • ☄【ANTI-THEFT ALARM】-- Long press the bike light switch for 3 seconds, you will get the anti-theft mode. Any movement of your bike will issue a harsh alarm sound to scare away thieves, which can protect your bike from theft. (Note: This set has NO phone mount and NO battery bank)
  • ☄【3 LIGHTING MODES & 5 MODES BIKE HORN】-- 3 lighting modes of mountain bike headlight, super bright, gives you awesome visibility wherever you are. Fined cycle horns is easy to use. 5 different sounds, of which each tone ranges between 100-120 dB, are loud enough to alert anyone to your presence. Long press 5 seconds to change bell sounds.
  • ☄【USB FAST CHARGING】-- Built in 1200mAh rechargeable lithium battery for bike headlight, fully charged with a USB cable for about 3 hours. IPX4 water resistant protects against splashing water. Our bike tailight is built in 500mAh rechargeable lithium battery.
  • ☄【7 MODES BIKE TAIL LIGHT】-- Comes with a bicycle tail light making your loved ones safer in any low light conditions. Instantly improve your visibility & safety with our Ultra Bright LED bike light. This is a great design for cycling at night or in places where visibility and safety are concerned.
  • ☄【EASY INSTALLATION & VERSATILE】-- The headlight is equipped with a mounting bracket that can be easily fixed to the handlebar. The silicone mount strap for taillight are designed with four openings that tightly fit around most size seat posts. Both headlight and taillight can be easily loosen and fasten without tools. This bike light set is versatile for cycling, hiking, camping, or any outdoor activity and can be used as emergency flashlight.
RANK NO. 8
3 Pieces Bike Bell and Lights Set, Include Electric Bike Bell USB Rechargeable Bicycle Bell 130 db 3 Modes Cycling Alarm Horn with Rechargeable LED Bicycle Lights Bike Light Front and Rear Bike Light
  • What you receive: package comes with 1 piece electric bike bell and 2 pieces LED bicycle lights, 3 pieces in total, which can meet your bike installation and replacement needs
  • Electronic bicycle bell: the rechargeable bicycle bell with 130 db loud volume, people can hear the sound easily and clearly, the bike bell is USB rechargeable (includes), waterproof, once recharged can ring for about 2000 times, 1.2 hours can be fully charged, allows you to use for 20-30 days; And the control switch and the bicycle horn are separated, just install the control switch next to your thumb, convenient and safe, including 3 models to switch
  • Front and rear bike light: the bike lights are USB rechargeable (includes), fully charged within 2 hours, run time up to 6-12 hours.;The front light goes green when fully charged, and the rear light has an orange hue when finished; Including 4 modes: full brightness, half brightness, fast flashing and slow flashing mode, you can adjust the modes according to your actual needs
  • Durable to use: the LED bicycle lights are made of quality plastic and aluminum alloy, also comes with a rubber strap, weather-proof and durable to last for long time; The cycling alarm horn is made of durable plastic and rubber strap, soft and flexible to install, will not scratch your bikes
  • For attention: the bicycle front and rear bike lights can be widely applied to attract people's attention when you're running, jogging, hiking, camping, walking your dog, cycling and other situations; The electronic bicycle bell is suitable for mountain bike, road bike, small wheel scooter and so on, which will keep your biking safely
RANK NO. 9
Mengshen Smart Wireless Remote Control Bike Bicycle Alarm Siren Shock Vibration Sensor Cycling Lock Anti-Theft Guard Burglar Alarm MS-Z04
  • Perfect to protect your shop, office, home, car, house or anywhere requiring protection.
  • Simple to operate and easy to install.
  • Super loud, simple, easy to theft
  • Short leave cycling, no longer bother to go locked up
  • Wireless Vibration Alarm with infra-red remote control.
SaleRANK NO. 10
Update Design 100 DB Waterproof Bicycle Horn Electronic Bell Safety Trumpet USB Charge Bike Horn Alarm Cycling Audio Warning Siren Cycling Accessory (Black) [IMPROVED VERSION]
  • Safety First: This Loud Volume & Mini Size Electric Bike Horn can reach 100 db which is loud enough to alert anyone or even people in a vehicle to your presence. Perfect bicycle accessories for you or your kids.
  • Environment-friendly: Instead of using normal battery, the little scooter horn is powered by a rechargeable battery. It can 2000 times with a full charge, which is enough to work 20-30 days.
  • Durable with full protection: IP65 level waterproof + Anti-dust + Shatter-resistant. Fully satisfy your outdoor cycling needs.
  • East to install and quick release: easily mounted and secured with the stretchable straps. No tools needed. You can install or uninstall it on your bike handle bar within 20 seconds.
  • Separate Switch Design: Control switch and bike horn are separated. You can install the control switch right next to your thumb, which can keep you hand still on the bar when you press it. Keep it safe cycling.

Everything You Need to Know About Bike Alarms

Mechanical

Let’s start from the description of the mechanical anti-theft devices (chains, cables, U-shaped anti-theft devices), which are the most common and economic ones.

If you are going to buy such a system, never just fix the frame to a pole because they could take away wheels and a saddle. On the contrary, never just set the wheel because you could find only the one on your arrival.

If you fix the bike to a pole too low, they can take everything away from you by simply lifting it.

Having said that, one of the safest of the mechanical anti-theft devices is the U-shaped one because it has a considerable diameter that the thief will never be able to scratch with a standard wire cutter.

Of course, it is more substantial, but it cannot be compared to the simple steel cable that everyone can cut in a few seconds: this is because the cable is almost never often enough, say 1 cm in diameter.

Since these are products that have an affordable price, the right solution is to buy them both U-lock and cable. Indeed, sometimes they are sold together so that the wheels can be tied together with the wire and the frame can be fixed to a pole with the U-shaped mechanism.

As for combination or key chains, the quality of the steel and the thickness of the links must be assessed: the most straightforward and cheapest models can be broken in in no time.

The sheath and the external coating hinder the action of the mitre saw but, in general, it must be said that there is no system that can resist the attack of a good grinder.

Alarm

Another type of burglar alarm is that with acoustic alarm. How does it work? It consists of two parts: the actual device that emits the sound and the remote control.

The device must be fixed under the seat, the remote control must instead be set to the handlebar but can be detached to always keep it with you at the bar while having coffee or queuing at the post office.

When the attacker approaches and tries to move the bike, the alarm is triggered immediately by alerting the owner or otherwise acting as a deterrent for the thief.

This sound is audible but lasts a few seconds, and it serves only as a warning. If the thief persists or decides to remove the device from the seat, the alarm sounds continuous, without stopping; the only way to disable it is from the remote control which can have a range of several tens of meters or even 100 meters.

Often these (waterproof) devices are multifunctional because they also act as a practical rear light and even a bell. Take a look below, find some such models.

Gps

For some cyclists, the best anti-theft brand is the one that makes GPS models, those that work in conjunction with a SIM and therefore with your mobile phone. By identifying a perimeter that the bike cannot pass, the owner is immediately notified when someone takes it away.

These devices have the appearance of a standard rear light which however hides the satellite device inside or can be inserted into the barrel of the bike and be completely invisible on the outside.

On the phone, the map appears with the coordinates that indicate where the bike is located with a margin of error of a few meters.

These alarms have autonomy of a few days, then they must be recharged and can also be used on motorcycles or cars, even merely to check the movements made by a person who does not necessarily have to be the thief.

The Most Advanced Models

Starting from the most common systems, the U-shaped mechanical hook is well known among bike owners because it is difficult to cut or break (with wire cutters or hacksaws).

The consistency of the diameter prevents its removal, and thanks to the particular shape you can fix the frame to the pole. If you have an even better steel cable, because in this way you can tie the wheels to the U-hook, attaching this to the mast: ideal double protection if you have to leave the bike unattended for a long time.

Another extremely advanced system is the sound system which plans to place the alarm under the seat (check the compatibility between the two elements), and this starts to sound (reaching 120 decibels) as soon as the attacker tries to take the bike away, moving it or lifting it.

The warning continues to be issued even if an attempt is made to remove the seat and can only be deactivated via the remote control which has a range of 100 meters.

But the functionality of this system does not end there: in fact, it also acts as a bell and rear light. Therefore it proves even more useful by protecting your safety when you are pedalling. You can charge it via USB, and you won’t have to be afraid to leave it exposed to water, because it’s waterproof.

Gps Anti-Theft

The system equipped with a GPS antenna is even more advanced than those described so far. In combination with a SIM card, the burglar alarm warns the owner as soon as the bike exceeds the preset range of meters and the map is sent to him, useful for reaching the thief and recovering the motorcycle.

From the outside the alarm looks like a traditional position light but can also be inserted inside the barrel of the bike, being invisible to foreign eyes: given its size, it is incredibly versatile, and you can also use it on the machine or provide it to a person as support in any awkward moments.

Useful Tips for Cyclists

Regardless of the protection system, always tie your bike to a rack, a pole or a tree, to make theft more difficult and complicated. Don’t just match the saddle or the wheel, as these are easily detachable components: by removing the motor or the seat, and the attacker can take the rest of the frame home.

Tie the pole or tree to several elements of the bike, to discourage the thief who immediately realizes the complexity of the situation.

If you don’t want to resort to technology and prefer to use a traditional chain, choose at least the one with a square section. Finally, we conclude this guide by reminding you that no method is infallible, but that having targeted measures is an excellent deterrent.

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