A bike lock with an alarm adds an audible layer of protection that can attract attention when someone tampers with your bike. The best choice depends on where you park, what you ride, and whether you prefer a rigid U-lock, compact disc lock, or flexible chain.
We compare 10 alarm-equipped locks across security design, alarm volume, power options, weather resistance, portability, and everyday usability so you can choose confidently for a bicycle, e-bike, scooter, or motorcycle.
Best 10 Bike Lock with Alarm Picks for 2026
Fat-Tire E-Bike Defender
- Motion-triggered audible alarm
- Fits 20" x 4" fat tires
- Rubber-coated, weatherproof shackle
Best For: Fat-tire e-bikes, scooters, and motorcycles
Rechargeable Alarm Pick
- 120dB vibration-triggered alarm
- USB-C rechargeable battery
- Includes reminder and helmet cables
Best For: Disc-brake bikes, e-bikes, scooters, and motorcycles
Maximum Sound Deterrent
- 130dB built-in alarm
- 14mm stainless-steel U-lock
- 52-inch looped security cable
Best For: Bikes, e-bikes, scooters, and outdoor equipment
Compact Disc-Brake Option
YOHOOLYO 110dB Alarm Disc Lock
- 110dB motion-triggered alarm
- 7mm locking pin with delay
- Includes cable and carry pouch
Best For: Portable security for compatible bikes, scooters, and motorcycles
Remote-Controlled Protection
- 115dB vibration and tamper alarm
- Remote or four-digit password access
- IP55 design with 10mm steel cable
Best For: Cyclists wanting key-free operation and a loud alarm
Heavy-Duty Chain Security
- 4-foot, 10mm manganese-steel chain
- 80dB vibration alarm
- Three keys and protective canvas sleeve included
Best For: Motorcycle and bike owners prioritizing chain strength and reach
Rechargeable High-Volume Security
110dB Rechargeable Alarm Chain Lock
- 110dB motion alarm with adjustable settings
- 4-foot A3 steel chain with three keys
- USB-C rechargeable lock and remotes
Best For: E-bike and scooter owners wanting remote, rechargeable security
Best All-Weather Pick
110dB 4ft Bike Chain Lock with Alarm
- 110dB alarm adds an audible theft deterrent
- 4-foot steel chain suits multiple uses
- Silicone cover helps protect the alarm head
Best For: Versatile outdoor security for bikes, scooters, motorcycles, and gates
Best for Long Standby
8mm Rechargeable Bike Alarm Chain Lock
- 110dB vibration-triggered siren
- Up to 60 days of alarm standby
- USB-C charging for alarm and remotes
Best For: Commuters seeking rechargeable security with remote alarm control
Best Heavy-Duty Construction
BANGTING 8mm Manganese Steel Alarm Lock
- 8mm manganese-steel chain
- 110dB alarm with IP65 weather rating
- Protective sleeve helps prevent scratches and rust
Best For: Heavy-duty outdoor security across bikes and other equipment
Fat-Tire E-Bike Defender – Heavy-Duty Alarm U-Lock
If you need a bike lock with alarm for a fat-tire e-bike, this EnzZone U-lock combines a motion-triggered alert with a 16mm stainless-steel shackle. Its larger opening is designed for 20″ x 4″ fat-tire e-bikes, scooters, and motorcycles, but measure your setup before buying.
Best For: Fat-tire e-bike owners who want a weatherproof U-lock with an integrated alarm.
Pros:
- Motion sensor triggers an audible alarm when tampering is detected.
- 5″ wide by 6″ tall shackle opening accommodates larger setups.
- Rubber-coated shackle helps protect the frame from scratches.
- Includes three keys and is designed for outdoor conditions.
Cons:
- Its larger, heavier design may be less convenient for lightweight bikes.
- Fit should be checked carefully against your frame and locking point.
This is a practical choice when alarm-based deterrence and generous clearance matter more than compact carryability. The weatherproof construction and included spare key add everyday convenience.
Rechargeable Alarm Pick – 120dB Rechargeable Disc Lock
This rechargeable bike lock with alarm is a versatile disc-brake lock for bicycles, e-bikes, scooters, mopeds, and motorcycles with disc thickness up to 7mm. It pairs a vibration sensor and 120dB alarm with a reminder cable and helmet-lock cable.
Best For: Riders who want a rechargeable alarm lock with accessories for securing a bike, helmet, or motorcycle.
Pros:
- 120dB alarm uses warning beeps before triggering a full alarm.
- 500mAh battery charges through USB-C in about 1.5 hours.
- IP67 waterproof rating supports use in rain, snow, and dust.
- Includes a 5ft reminder cable and helmet-lock cable.
Cons:
- Requires a compatible disc brake with thickness of 7mm or less.
- Disc locks may be less suitable when no accessible disc-brake hole is available.
Its rechargeable battery eliminates routine battery replacement, while the reminder cable helps reduce the chance of riding away with the lock attached. The accessory bundle makes it useful for broader two-wheel security.
Maximum Sound Deterrent – 130dB Alarm U-Lock
For shoppers prioritizing a loud alarm, this bike lock with alarm combines a 14mm U-lock with a 130dB tamper alert. The included 52-inch, 12mm double-looped cable adds flexibility for securing a frame, wheel, helmet, or another bike.
Best For: Bike and scooter owners who want a loud alarm plus a versatile secondary cable.
Pros:
- 130dB alarm is designed to alert nearby people and deter tampering.
- 304 stainless-steel construction resists rust and supports durability.
- 52-inch double-looped cable expands locking options.
- Suitable for bikes, e-bikes, scooters, and outdoor equipment.
Cons:
- The product notes do not specify a rechargeable battery.
- A U-lock-and-cable setup may be less compact to carry.
This model stands out for its stated 130dB alarm and included cable. It is a strong fit when audible deterrence and the ability to loop around multiple components are central to your buying decision.
Compact Disc-Brake Option – YOHOOLYO 110dB Alarm Disc Lock
This YOHOOLYO bike lock with alarm uses a 7mm locking pin and motion sensor with a five-second delay. It is designed for motorcycles, bicycles, scooters, and similar vehicles with suitable wheel holes or spokes, and includes a 5ft reminder cable and carry pouch.
Best For: Riders seeking a portable alarm disc lock with a reminder cable and storage pouch.
Pros:
- 110dB alarm provides audible tamper deterrence.
- Five-second sensor delay helps with arming and handling.
- Includes two keys, a 5ft reminder cable, Allen key, and pouch.
- Weather-resistant and described as waterproof and rust-resistant.
Cons:
- It requires a compatible wheel hole, spoke, or disc-locking position.
- Uses internal batteries rather than a rechargeable battery.
- Its 7mm pin may not fit every vehicle or wheel opening.
The included pouch and reminder cable make this a convenient portable setup. Check your wheel or disc configuration first, since compatibility depends on having an opening that accepts the 7mm pin.
Remote-Controlled Protection – Mengshen Alarm Bike Lock
If you want a bike lock with alarm that offers key-free access, the Mengshen combines a 31-inch steel cable with remote or four-digit password unlocking. Its vibration and tamper alarm adds an extra layer of deterrence for bikes and other outdoor gear.
Best For: Cyclists who want remote access, a loud alarm, and flexible use for bikes, scooters, gates, or similar valuables.
Pros:
- 115dB alarm can respond to movement, vibration, cutting attempts, or disassembly.
- Remote control works from up to 40 meters, while a four-digit password provides an alternative.
- IP55-rated design and 10mm steel cable suit indoor and outdoor use.
- One remote can control multiple locks, and up to eight remotes can be programmed to one lock.
Cons:
- The 31-inch cable offers less reach than the longer chain locks in this roundup.
- Uses three AAA batteries rather than rechargeable power.
- Remote and lock battery condition requires monitoring through indicator behavior and sounds.
This is a feature-rich choice when convenience and a very loud alarm matter as much as basic cable security. Its shorter cable is best suited to compact locking setups rather than securing multiple large objects.
Heavy-Duty Chain Security – AKM Safe 80dB Alarm Lock
This bike lock with alarm pairs a 4-foot, 10mm square-link manganese-steel chain with an 80dB vibration alarm. It uses a traditional key cylinder and includes three keys, making it a practical option for riders who prioritize chain strength and generous reach.
Best For: Bikes, motorcycles, scooters, or mopeds needing a long, heavy-duty chain and straightforward keyed access.
Pros:
- Triple-heat-treated manganese steel chain is designed to resist prying and cutting.
- Four-foot length can secure two motorcycles together according to the supplied specifications.
- 80dB vibration alarm adds an audible theft deterrent.
- Includes three double-bitted keys and a canvas sleeve to reduce wear and noise.
Cons:
- At 6.6 pounds, it is substantially heavier than a compact cable lock.
- The alarm is quieter than the 110dB and 115dB alternatives here.
- Requires eight LR44 batteries rather than rechargeable charging.
Choose this model when physical chain heft and length are the main priorities. The tradeoff is portability: its 3kg weight makes it more appropriate for motorcycles or fixed parking locations than lightweight everyday cycling.
Rechargeable High-Volume Security – 110dB Rechargeable Alarm Chain Lock
For shoppers seeking a bike lock with alarm and remote convenience, this model uses a 4-foot A3 hardened-steel chain with a 110dB motion alarm. Rechargeable power, adjustable sensitivity and volume, and two wireless remotes make it suited to frequent use with bikes, e-bikes, and scooters.
Best For: E-bike and scooter owners who want a long chain, remote operation, adjustable alarm settings, and rechargeable power.
Pros:
- 110dB alarm activates when motion is detected and offers three volume levels.
- Two sensitivity settings help tailor the alarm to the parking environment.
- Both the lock alarm and remotes recharge via USB-C, with up to 60 days of alarm standby.
- Includes three keys, two remotes, a storage bag, and a protective silicone cover.
Cons:
- The 8mm chain is thinner than the 10mm chains listed in the other options.
- Rechargeable devices still require periodic charging.
- The supplied notes do not specify an IP rating for the alarm assembly.
This lock stands out for adjustable alarm behavior and low-maintenance USB-C charging. It offers a useful balance of reach and convenience, though buyers focused strictly on maximum chain thickness may prefer a 10mm alternative.
Best All-Weather Pick – 110dB 4ft Bike Chain Lock with Alarm
If you want a bike lock with alarm that can also secure scooters, motorcycles, or gates, this 4-foot chain model offers flexible coverage. Its 110dB alarm adds an audible deterrent, while the silicone-covered alarm head is designed to help protect against rain and dust.
Best For: Riders who want a versatile chain lock with remote-controlled alarm operation and weather protection.
Pros:
- 110dB alarm helps deter tampering.
- 4-foot steel chain works with bikes, scooters, motorcycles, and gates.
- Includes three keys, two alarm controllers, a carrying bag, and USB-C cable.
- Silicone alarm cover helps protect against rain and dust.
Cons:
- The remote controls the alarm only; the lock must be opened or closed with a key.
- At 1.07 kg, it adds noticeable weight for portable use.
This is a practical choice when you want one alarmed chain lock for several types of equipment. The key-operated lock and remote-controlled alarm are separate functions, so keep that distinction in mind before buying.
Best for Long Standby – 8mm Rechargeable Bike Alarm Chain Lock
This bike lock with alarm combines an 8mm alloy-steel chain with a vibration sensor that triggers a 110dB siren when the lock is shaken. Rechargeable remotes and an alarm with up to 60 days of standby time make it convenient for regular bicycle or e-scooter security.
Best For: Commuters who value rechargeable operation, remote convenience, and extended alarm standby time.
Pros:
- Vibration sensor activates a powerful 110dB alarm.
- Remote control can lock and unlock the alarm from a distance.
- Alarm and remotes recharge via USB-C and offer up to 60 days of standby time.
- Fabric sleeve and silicone alarm cover support flexible, outdoor use.
Cons:
- The 1.55 kg weight may be cumbersome for some riders.
- The supplied notes describe remote locking and unlocking for the alarm, but do not indicate keyless operation for the physical chain lock.
Choose this model if reducing charging frequency matters and you want remote alarm control. It is especially suited to bike and electric-scooter owners who prefer a rechargeable setup with included spare keys.
Best Heavy-Duty Construction – BANGTING 8mm Manganese Steel Alarm Lock
For shoppers prioritizing chain construction, this bike lock with alarm uses 8mm manganese steel and a zinc-alloy lock core. The 110dB alarm, IP65-rated wireless alarm design, and protective chain sleeve provide added security for bicycles, e-bikes, scooters, gates, and other equipment.
Best For: Owners who want a robust, multipurpose chain lock with weather-resistant alarm features.
Pros:
- 8mm manganese-steel chain is designed to resist cutting and sawing.
- 110dB alarm provides an additional theft deterrent.
- IP65-rated alarm is intended for outdoor and rainy conditions.
- Includes three keys, two remotes, a silicone cover, storage bag, and USB-C cable.
Cons:
- The 4-foot chain may be less convenient to carry than a shorter lock.
- Its heavy-duty materials and accessories can make the setup bulkier.
This model stands out for buyers who want a clearly specified manganese-steel chain and broad outdoor versatility. The protective sleeve also helps prevent scratches and rust while making the chain more comfortable to handle.
How We Picked the Best Bike Lock with Alarm
We evaluated these products by looking at the security hardware first, then the alarm system and practical ownership details. Important considerations include shackle or chain thickness, locking format, stated alarm volume, weather protection, power source, included keys or remotes, and whether the lock is suited to bicycles, e-bikes, scooters, or motorcycles.
Specifications such as decibel ratings are useful for comparison, but they do not guarantee identical real-world loudness. Alarm performance can vary with placement, surrounding noise, battery condition, and whether the lock detects vibration, movement, or an opened mechanism.
Quick Comparison
- U-locks: Rigid and difficult to manipulate, making them a strong choice when you can secure the frame to a fixed object.
- Disc locks: Compact and convenient for motorcycles and scooters, but they require a compatible brake disc and may not secure the vehicle to an immovable anchor.
- Chain locks: Flexible for securing frames and wheels around larger posts, though they are generally heavier to carry.
- Remote-controlled models: Convenient for arming or disarming at a distance, but the remote adds another battery-powered component to maintain.
Key Buying Factors for a Bike Lock with Alarm
Security Hardware and Fit
Choose a lock that fits both your vehicle and your parking routine. Thicker steel can improve resistance to cutting, while a shorter shackle may limit leverage. For a bicycle or e-bike, prioritize a design that can pass through the frame and a wheel while reaching a secure anchor.
Alarm Type and Controls
Check whether the alarm responds to vibration, movement, tampering, or a forced opening. A warning chirp followed by a sustained siren can help deter casual interference. Look for clearly described arming controls and consider whether you want a key, onboard button, or remote.
Power, Charging, and Weather Resistance
Rechargeable alarms reduce the need for disposable batteries, but they must be charged regularly. Review the charging connector, battery claims, and low-battery behavior. Weather-resistant construction is important for outdoor parking, but no electronic lock should be treated as permanently waterproof unless the manufacturer explicitly says so.
Portability and Everyday Use
A heavy chain may provide useful flexibility but can become inconvenient on daily rides. A compact U-lock or disc lock is easier to carry, while a reminder cable can help prevent riding away with a disc lock still attached. Confirm the lock’s dimensions, weight, key count, and included accessories before buying.
Who Should Buy Which Bike Lock with Alarm?
Choose a U-lock if you want a rigid, everyday lock for a bicycle or e-bike and usually park near suitable racks or posts. Choose a disc lock if compact storage matters and you ride a compatible scooter or motorcycle. Choose a chain lock if you need reach and flexibility around larger anchors, especially when securing a frame and wheel together.
Remote-controlled options suit riders who value convenient arming, while rechargeable models are useful for frequent use when you can maintain a charging routine. Before choosing, match the lock to your vehicle’s anchor points and use it through the frame—not only through a removable wheel.