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93 dB, fingerprint, Apple Find My: here is the new Quad Lock bike alarm

Quad Lock adds a logical piece to its bike ecosystem: a bike alarm-locator designed to stay fixed to the bike and work with Apple’s Find My app.

The idea is not to replace a lock. It would be risky to present it that way. But for a city bike, a road bike or a gravel bike used daily, the product addresses a real scenario: the quick stop, the bike left for a few moments outside a bakery, a café, a lobby or a terrace.

🚀 In brief:

  • Quad Lock launches a bike alarm-locator compatible with Apple Find My.

  • The module combines a motion alarm up to 93 dB, Apple Find My location and a fingerprint sensor.

  • Claimed battery life up to 6 months, IP66 housing, weight of 22 g and price from €59.99.

The module combines two functions: a motion alarm that goes up to 93 dB, and location via the Apple Find My network. No extra Quad Lock app to add, no subscription announced, but one clear constraint: you need to be in the Apple ecosystem.

What the module actually does

The module is a compact unit measuring 38 x 59.5 x 16 mm, weighing 22 g. It has a rechargeable lithium battery with a claimed battery life of up to 6 months between charges. Charging is via the supplied magnetic USB-C cable with Pogo contacts.

The alarm triggers in several stages. A light movement first produces an audible warning. If the bike continues to be handled, the system escalates to the full alarm. That is the expected principle: draw attention before the situation goes too far.

Location relies on Apple’s Find My. So it is not a standalone GPS tracker with a SIM card. The bike can be located via the network of Apple devices, like other compatible tags. To understand the differences between this type of solution and bike GPS trackers, it is worth laying out the topic calmly: community network, subscription, battery life, accuracy and compatibility do not all tell the same story.

The fingerprint sensor - a practical detail

Quad Lock has integrated a fingerprint reader to arm or disarm the alarm without taking out your phone. It is probably one of the most interesting points for daily use.

The module can store up to 20 fingerprints. Useful if several people use the same bike: family, flatmate, colleague, a bike shared in a household. The brand also distinguishes the administrator fingerprint, intended for managing the module, and user fingerprints, intended for everyday use.

If your finger is wet or the reading is temperamental, Quad Lock says you can also disable the alarm via the Find My app, using the Play Sound function.

A good range of mounts, with a few limits

The real issue with this kind of accessory is not just the spec sheet. It is where you put it.

Quad Lock offers several options: integration with certain bike mounts from the brand, the Quad Lock 360 interface, an adapter for a bottle cage, an adapter for saddle rails, an extended mount, an extended mount Pro, a steerer tube mount, or an adjustable steerer tube mount.

The bottle cage adapter looks practical, but not necessarily the most discreet. It adds a visible piece in an area many cyclists already look at instinctively. Conversely, mounting under the saddle may be more appealing to keep things neat, provided you have enough space and keep access to the charging port.

Quad Lock specifies that you should leave at least 3 mm between the alarm and the base of the saddle, otherwise the sound can be muffled. It is a simple but important detail: an alarm silenced by placing it too close to a surface loses much of its value.

The supplied security screws are also a plus. The kit includes several screws and a dedicated tool, so the module is not simply stuck to the frame like a basic tag. One small caveat though: for steerer tube installations, Quad Lock says there is no security screw for the top cap. The mount can therefore be removed with standard tools.

IP66, 6 months of battery life: useful figures for a bike that lives outdoors

The housing is stated to be polycarbonate and nylon, with IP66 protection. For a road bike or gravel bike that sees rain, spray and the occasional quick wash, that matters more than it might seem.

The stated operating range is from -20 to +60 °C. Nothing exotic, but it comfortably covers typical European use, from winter commuting to a bike left in full summer sun.

The maximum 6-month battery life is appealing, though real-world use will depend on triggers, activation frequency, cold and battery ageing.

Use it well: a layer of security, not a guarantee

The product starts at €59.99 depending on the mounting option. In the world of connected bike accessories, the price is reasonable, especially if you already use a Quad Lock mount and the integration is clean.

But we should stay clear-eyed. A 93 dB alarm can deter, annoy, make someone hesitate. Location via the Apple network can help recover a moved bike. Neither function physically stops someone from walking off with the bike.

For a short stop, it is interesting. For an overnight outside, long parking or a high-risk area, you still need to go back to fundamentals: a proper lock, a solid fixed point, and an appropriate strategy. Our guide on choosing a lock for bikepacking applies here too: the goal is not to make theft impossible, but to make it more complicated, longer, and more visible.

Our take on this Quad Lock alarm

This launch is quite smart. Quad Lock is not starting from scratch: the brand already has a well-established ecosystem of bike mounts. Adding an alarm-locator compatible with this interface therefore makes sense, especially for riders who already use the brand daily.

The product seems particularly relevant for well-kept urban bikes, road bikes used for short trips, gravel bikes that also serve during the week, or bikes you do not want to load up with accessories that are too visible.

The main limitation is clear: Apple only. Android users should look elsewhere, unless that changes in future. A second point to keep in mind: the product depends on the quality of the installation. Too visible, poorly positioned or easy to remove depending on the setup, and it loses some of its value.

Still, the overall impression is positive: Quad Lock is not just selling a tag, but a solution better integrated than many DIY hidden-tracker setups. To secure a quick stop, it is exactly the kind of extra layer that can make a difference. Provided you never forget the first layer: the lock.

Additional information

Riding style

Gravel race

Frame

Carbon

Electric assist

No

Gender

Unisex

Year

2026

GP – Alarme quadlock
Quad Lock bike alarm and locator
⭐️ 4.5/5
“A discreet, well-integrated layer of security”
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Hugo
HugoFounder & passionate tester
A true cycling enthusiast since he was 11, Hugo is the author of the book "C’est Gravel" and the founder of the Gravel Passion media platform, which he launched in 2021. Since then, he has been sharing his passion with expertise with more than 1 million cyclists every year.
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