*Two anti-theft bolts and a special tool can be selected as options. (Sold as a set with the device only.)
*Two standard bolts for installation are included.
*A separate service fee will be charged.
Free for the first 30 days
All three road bike concerns are covered!
1
- Worried if even the most robust locks will be enough to protect it?
2
- Worried about leaving your bike unattended—even for a short time?
3
- Afraid to take your eyes off your bike for even a moment?
Why AlterLock?

Alarms & Notifications

Smartphone notifications

Monitor via Bluetooth

GPS & WiFi Tracking

Fine Controls

Small, Lightweight, and Inconspicuous
App Features
- ・Register your bike's photo, specs, and VIN number
- ・Toggle the device lock mode
- ・Device settings (for various situations including vibration detection level, alarm on/off, alarm duration, first alarm sound, number of alarms, regular transmission, etc.))
- ・Push notifications and audible alarms when the device detects vibration or receives location information
- ・View location and history while tracking on the map screen
- ・Tracks maintenance history for safer riding
Easy Installation
Install the app
Subscribe to Cycle Guard Service
Register your bike and device in the app
Attach the device

Device Specifications
Size | 159mm long x 38mm wide x 9mm thick |
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Weight | 50g |
Battery | Lithium polymer |
Charging terminals | USB Type-C charging cable not included |
Temperature | Operating Temperature -20~60℃ Chargeable Temperature 0~45℃ |
Uptime | Up to 1.5 months (varies according to usage) |
Communications | Bluetooth Low Energy / Sigfox |
Location Trackin | GPS (GNSS) / Wi-Fi |
Water/Dustproof | IP66 |
Accessories | Start guide, 2 mounting bolts |
Options | 2 anti-theft bolts, special tools *Only sold in sets with the device |
Price
Product Price | €134.99/£114.99(tax included) |
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Service Fee | £3.49/month,£34.99/year(tax included) €3.99/month,€39.99/year(tax included) |
Communication Areas
AlterLock transmits data via Sigfox (the LPWA communication standard) when outside of Bluetooth range. LPWA makes it possible for the device to communicate on its own with low power consumption and low cost. Since Sigfox has different communication bands in different regions, Alterlock comes in several editions.
The European version is available in the following countries: Belgium, Croatia, Czech Republic, Denmark, France, Germany, Hungary, Ireland, Italy, Luxembourg, Portugal, Slovakia, Spain, Netherlands, United Kingdom and Finland.
FAQ
Can AlterLock be installed on any bike?
It can be attached to a standard sports bike using its bottle holder's base or in conjunction with your existing bottle holder.
What areas can I use this service in?
It can be used within Sigfox's service area (primarily Europe). Outside the service area, all functions will work within the Bluetooth transmission range. You can check the service area from this page.* Even within the service area, notifications may not reach your smartphone indoors where the signal is weak or in an environment with poor reception.
How is AlterLock different from Bluetooth trackers?
Bluetooth trackers are challenging to track once they leave your hands. AlterLock has stand-alone communication and GPS, so you can track your device wherever you go.
Can I check my location anytime?
This product is designed specifically for theft prevention. It cannot be used as a GPS tracker that continuously displays location information. Vibrations made in lock mode activate the GPS to significantly reduce power consumption and enable long-term tracking.
Can the device be removed easily?
If you try to remove the device, AlterLock detects the vibration and sounds an alarm to notify you, so you can rush to your bike. If you're still concerned, an additional anti-theft bolt and special tool are available. Please consider purchasing the device as a set. These items are not sold separately.
Is it possible to adjust the sensitivity of the alarm sound and vibration detection?
Is it possible to adjust the sensitivity of the alarm sound and vibration detection?