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.
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.