10 Best Motorcycle Alarms 2025 in the United States

The YOHOOLYO Alarm Disc Lock is a strong anti-theft option for motorcycles, scooters, and bicycles, especially for those seeking a loud alarm combined with a sturdy physical lock. It features a loud 110-decibel alarm that triggers automatically when it senses vibration or shock, effectively deterring potential thieves. The lock is constructed from forged stainless steel, making it crash-resistant and durable. Its waterproof design ensures resistance to rain and rust, making it suitable for outdoor use.

Installation is straightforward with its one-press locking system, and it fits disc brakes up to 6mm thick, which covers many common bikes and scooters. The inclusion of a 5-foot reminder cable helps reduce accidental riding with the lock still engaged, enhancing safety. It operates on 12 LR44 batteries, with backups included, providing good battery life without frequent replacements. While it does not feature remote control operation, all functions are manual.

The lock requires disc brakes to fall within specific size limits (thickness and width), so checking compatibility before purchase is important. The set also includes two keys and a carry pouch for convenient storage and transport. This YOHOOLYO alarm disc lock serves as a reliable, easy-to-use security tool for riders looking for a loud, physical deterrent with weather resistance, though it lacks remote operation and has certain size restrictions that buyers should verify.

The URBAN UR14S Hi-Tech Motorcycle Alarm Disc Lock is a strong security device designed to protect your motorcycle from theft. It features a double locking mechanism with a 14mm stainless steel shaft, adding extra durability and resistance against physical attacks like drilling or sawing. Its alarm system emits a loud 120dB sound, which is very effective at deterring thieves, and you can choose to activate or deactivate the alarm depending on your preference. The lock includes a warning beep that activates with light touches to warn potential thieves before the full alarm sounds, providing balanced sensitivity to avoid false alarms while still offering protection.

The CR2 lithium battery powers the alarm and is designed for long life. Installation is straightforward as it functions like a typical disc lock that fits onto your motorcycle’s brake disc. Included accessories such as keys, an Allen wrench, and a carrying pouch add convenience for the user.

This lock suits riders seeking a high-security, alarm-equipped disc lock with the flexibility to turn the alarm off when needed. It is especially good for those who want a reliable mechanical lock combined with a hi-tech alarm feature.

The ABUS Granit Detecto XPlus 8077 2.0 is a sturdy motorcycle alarm lock made from hardened steel, designed to provide strong physical protection by securing your bike's brake disc. It features an intelligent two-stage alarm system with a pre-alarm warning that triggers on initial movement, followed by a 100 dB loud alarm if the movement continues for 15 seconds. This helps deter theft early without immediately causing noise, which is a thoughtful touch. The lock’s XPlus cylinder adds extra resistance against tampering, like picking, making it harder for thieves to defeat.

The lock includes LED indicators that show the alarm status and battery life, helpful for knowing when maintenance is needed. It runs on two AAA batteries, which are included. Transport mode lets you lock the bike without triggering the alarm, useful if you need to move the bike short distances without causing false alarms. Installation is straightforward since it fits directly onto the brake disc, requiring no complex setup. While the lock is robust, water resistance is not explicitly stated, so caution may be advisable in very wet conditions.

This product suits riders looking for a reliable physical lock combined with an audible alarm, especially those who want a smart alert system before the full alarm sounds. It may be less ideal if digital or remote alarms are preferred or if waterproof features are required. The lock balances tough mechanical security with a helpful alarm, making it a solid choice for everyday motorcycle protection.