We create next-generation, smart security systems that actively prevent theft while integrating seamlessly into your ride.
TMD Chain Lock
Smart technology. Refined design. Uncompromising protection.
Intelligent Alarm System
A 100db built-in alarm reacts instantly to interference - turning passive security into active protection.
No keys, no stress.
No app to unlock. No faff. Remote access when you’re phone’s in range. Simply press the button and go.
The perfect fit
A silicone cover protects your frame, while bulletproof-grade Dyneema fibres and Kevlar encase a hardened steel chain to resist cutting and force.
A simple, powerful App
The free TMD Lock App extends control far beyond just the lock itself.
Share Access
Grant your friends and family remote access without having to duplicate or exchange keys.
Activity Insights
See when, where and by whom the lock has been used - including activity from shared users.
Locate Your Lock
Find the last known location of your lock directly within the app, ensuring it’s always traceable.
Protection that looks as good as it works.
The TMD Chain Lock is available in three different colors and sizes. Optimized for e-bikes, cargo bikes, and longtails.
Meet the line-up: One philosophy, three forms.
The Chain Lock is available now. Ring and U-Lock models are coming soon - sharing the same smart, design-led security standard. Different models, one uncompromising approach.
Security is in our DNA.
TMD Locks is a Dutch company, built on the solid foundation of TMD Security. For 20+ years, we’ve engineered protection for high-value financial infrastructure worldwide. Today, we apply that expertise to innovative, intelligent security solutions built to actively prevent the growing challenge of bicycle theft.
Don’t just hear it from us
Read what others have to say about the TMD Chain Lock.
Luca F.
After meeting TMD Locks at the Bike2Business conference, I was confident in the lock’s protection for my e-bike. The alarm was impressively loud. My pre-order is now confirmed.
Stan J.
After two recent bike thefts in Amsterdam, I was looking for a high quality lock. At the Bike2Business conference, I spoke with TMD Locks and tested the lock myself. In addition to its enhanced security, it opens and closes very smoothly.
Jeroen D.
As a tech enthusiast, I was immediately impressed by TMD Locks. The combination of smart features, built-in alarm, and overall design made me pre-order right away.
FAQ
How does the TMD Chain Lock work?
The TMD Chain Lock is a keyless chain lock that connects to the TMD Locks app on your smartphone via Bluetooth.
Once you're near your ride, the TMD Chain Lock will make a connection. You can lock or unlock the lock with a single tap on your lock.
The lock also features a built-in alarm, which you can activate via the app or by pressing the button on the lock twice.
Can I still unlock my TMD Chain Lock if my phone's battery is dead?
Yes, if your phone battery is dead, you can always manually unlock the lock using your unique code, which you can set up in the app. This code can be entered using the button on the lock.
How long does the battery last?
Battery life depends on usage. With normal use, a fully charged battery lasts about 9 months. Charging the battery from 0 to 100% takes about 2 hours.
How loud is the alarm?
The alarm emits a sound of approximately 100 decibels. Enough to scare any thief away.
What features does the app offer?
The app lets you unlock your lock, track its last known location, share access with friends or family, and more.
How secure is the TMD Chain Lock?
The TMD Chain Lock is ART-certified and approved by insurance companies.
While the lock body is designed to withstand the harshest conditions and attacks. Every component has been engineered to stop attackers.
The TMD Chain Lock is nearly unbeatable, withstanding high-velocity impacts, bolt cutters, and even sophisticated electronic attacks.
Shipping
We aim to ship your order within 1 business day.
Free returns
Not satisfied? You can return the product for free within 14 days, provided it is unused and in the original packaging. Please contact support to arrange this.
Warranty
We offer a 2-year warranty for consumers.
