10 Best Bike Alarms 2025 in the United States

The Kryptonite Alarm Disc is a solid option for those looking to secure their motorcycles or other valuable items. One of its standout features is the 120dB alarm, which is quite loud and effective in deterring theft. The alarm activates upon detecting tampering, showcasing good sensitivity and providing an extra layer of security. The lock itself is made from durable alloy steel with a 6MM hardened steel locking pin, making it tough to break and suitable for various rotor sizes.

Additionally, the weather-resistant design ensures the electronics module is protected from the elements, making it reliable in various weather conditions. Battery life is impressive, with the replaceable lithium battery lasting up to a year, so you won't need to worry about frequent replacements. Installation is straightforward due to the simple key-locking mechanism, making it user-friendly even for those less familiar with technical setups.

However, while the lock is heavy-duty and multifunctional, it might be somewhat bulky for smaller bikes or items like backpacks. Some users may find the weight and size (9 x 6 x 2 inches) to be a bit cumbersome for regular handling. The Kryptonite Alarm Disc provides robust security features and ease of use, making it a suitable choice for motorcycle owners or anyone needing strong anti-theft protection.

The ABUS Folding Lock-Bordo XPLUS Alarm 6000KA/90 is a solid choice for anyone looking to secure their bike with both strong physical protection and an alarm system. The lock features a sturdy folding design with specially hardened steel, offering good resistance against cutting or tampering. It comes with a high-quality XPLUS cylinder that adds extra security against picking, which is a nice upgrade compared to basic locks.

Its alarm system can emit a warning sound before triggering a loud 100 dB alarm for 20 seconds if suspicious movements are detected, helping to deter thieves effectively. Sensitivity is intelligent, using 3D position detection to catch shocks without false alarms. Installation is straightforward, thanks to the included lock holder bracket that can be mounted without tools and holds the lock securely on the bike frame.

The lock’s 90 cm length is versatile for locking various bike parts, and its soft coating protects your bike’s paint from scratches. Weighing around 1.45 kg, it balances security and portability well. This model fits the bill if you want a strong physical lock with an integrated alarm that’s easy to install and offers good theft deterrence.

The USUPERINK Bike Alarms for Ebikes come with a robust set of features aimed at providing effective anti-theft security. One of its standout strengths is the alarm volume, which can reach up to 113dB—super loud and excellent for deterring thieves. The alarm also offers three adjustable volume levels and seven levels of sensitivity, allowing users to tailor the settings to their specific needs, whether it's a gentle touch or a strong push that triggers the alarm. This flexibility makes it suitable for various applications, including bicycles, motorcycles, and even doors and windows.

The IP65 waterproof rating means it can handle outdoor conditions well, adding to its durability and reliability in different weather scenarios. Another advantage is the ease of installation—no screws or wiring are required, and it comes with double-sided stickers and straps for straightforward setup. The wireless remote control is a convenient feature, offering a strong range of up to 66 feet, and includes a vehicle search function to help locate your bike in a crowded area.

The product does have some limitations. Battery life could be a concern as it requires 3 AAA batteries, which might need frequent replacements depending on usage. Additionally, while the alarm can be very loud, some users might find even the lowest setting too loud for their preference. The remote control feature is quite useful, but it could be less reliable if obstructed by physical barriers. Despite these minor drawbacks, the USUPERINK Bike Alarms for Ebikes offer a solid balance of functionality and user-friendly features, making them a strong choice for those looking to enhance the security of their bikes or similar items.