A better way to lock your bike

Experience effortless keyless locking, combined with a powerful built-in alarm for added peace of mind. The TMD Chain Lock turns locking your bike into a faster, smarter experience.

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Your phone is your key

Unlock with a simple press of the lock’s button when your phone is nearby. No keys, no fumbling. <new paragraph> And if you’re ever without your phone, you can still open it using your personal emergency code.

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Integrated 100 dB alarm

A powerful 100 dB alarm sounds when tampering is detected, adding an active layer of protection that helps deter unwanted attention.

Soft on your bike. Tough on thieves.

The soft exterior keeps your frame protected from scratches, while the tough, impact-resistant design is built to withstand heavy impacts and drops.

Soft silicone body

A soft silicone body protects your frame from scratches and cushions the lock against accidental drops.

Hardened steel core

A hardened steel core protects the lock’s critical components against cutting tools and brute force.

A better kind of chain

Advanced materials make the sleeve soft, flexible and surprisingly light. All without compromising on protection - the TMD Chain Lock is one of the lightest ART-2 certified chain locks.

Technical polyester outer layer

A double-braided polyester exterior adds durability and helps protect against tearing and everyday wear.

Dyneema® & Kevlar® reinforcement

High-performance fibers provide exceptional resistance to cutting and heat, helping protect the chain from serious attacks.

Hardened steel chain

A specially hardened manganese-alloy steel chain offers serious resistance while remaining flexible and surprisingly lightweight.

Built for the elements

From freezing temperatures to heavy rain and accidental drops, the TMD Chain Lock is built to keep performing. Water-, temperature- and shock-resistant, it’s engineered to handle whatever the ride throws its way.

Water resistant

Built to withstand rain, snow and mud, keeping your lock protected in wet and messy conditions.

Temperature resistant

Engineered to perform reliably across a wide range of temperatures, from freezing cold to intense heat.

Shock resistant

Designed to withstand heavy impacts, repeated blows and accidental drops without compromising reliability.

Engineered to withstand serious attacks

Every part of the TMD Chain Lock is engineered with security in mind. From heavy physical attacks to attempts at electronic tampering, the lock is designed to resist, withstand and keep protecting your bike.

Complete control with the app

The TMD Locks app lets you do so much more than just opening your lock. Manage access, keep track of activity and always know where your lock was last seen - all from one simple, intuitive app.

Share access

Give friends and family access to your lock without handing over a key. Share access directly from the app and stay in control of who can use it.

Activity insights

See when your lock was used and by whom. Keep track of your own activity and any activity from people you’ve shared access with.

Find your lock

See the last known location of your lock directly in the app, so you can keep track of where it was last used.

Frequently asked questions

What makes a TMD Smart Lock secure?

Forgetting or losing your keys is finally a thing of the past.

Our smart locks feature a keyless design with no traditional keyhole, making them immune to conventional break-in methods. Common theft techniques are no longer effective; there is simply nothing to drill, pick, or pull.

By combining keyless Proximity Unlock technology with extremely rugged hardware, TMD Smart Locks are certified to both ART-2 and IP57 standards. This ensures our Smart Locks are officially recognized and approved by insurance providers.

How does the TMD Chain Lock work?

The TMD Chain Lock offers a true keyless experience using advanced Bluetooth Proximity Unlock technology. There is absolutely no faff: your smartphone stays in your pocket, and the lock automatically recognizes your unique digital ID as you approach. Simply press the button on the lock once to unlock and ride away.

For added security, the lock features a built-in 100dB alarm. You can easily arm the alarm via the TMD app or by double-pressing the lock button. Once activated, the alarm will trigger instantly if any unauthorized movement is detected, keeping your ride safe and sound.

Can I unlock without my phone?

Yes. Every TMD Lock features a manual override. Simply use the button on the lock to enter the unique security code you’ve set up in the app, ensuring you’re never locked out.

How long does the battery last?

A single charge keeps your lock powered for approximately 9 months under normal use. When it’s time to top up, you’ll be back to 100% in just 2 hours.

How loud is the alarm?

At 100 decibels, our alarm is designed to be impossible to ignore. The alarm provides a powerful layer of active defense for your e-bike.

What can I do with the TMD lock app?

The TMD lock app gives you total control by allowing you to share digital access with friends and family instantly: no physical keys required. You can also monitor real-time activity logs to see exactly who used the lock and track its last known location to ensure it’s always where it should be.

Is the TMD Chain Lock insurance approved?

Yes, the TMD Chain Lock is ART-2 certified. This is the minimum requirement for Dutch and most international theft insurances. You can use the lock with all major insurers, such as ANWB (Unigarant), ENRA, King Polis, Laka, Alteos, Inshared, Be-Insured, Orion, ZLM, Qover (NL+BE), KBC (BE) and VAB (BE)*.

Important notes when applying:

Key Number:
Enter your lock’s serial number in the field where the insurer asks for a key number. In some cases, insurers are already "smart-lock-ready" but still require a key number for their system. If this happens, please use your serial number.

Proof in Case of Theft:
Instead of handing over two physical keys, you provide the digital log file (history) from the TMD app in the event of theft. This serves as official proof that your bike was locked. Through the app, you can easily view and export your history (or take a screenshot). This functions as digital evidence that the bike was correctly locked at the time of the theft. Our team is always available to support you with this.

*Is your insurer not listed? Check your policy regarding the acceptance of smart locks and digital evidence.

Is the TMD Chain Lock accepted for bicycle leasing schemes?

Yes, the TMD Chain Lock is ART-2 certified, meeting the security standard required by major bicycle leasing providers in both the Netherlands and Germany.

You can include the TMD Chain Lock directly in your bike lease package with providers such as:

  • Netherlands: Fisc Free, NFP, Athlon Bike, Alphabet Lease, Lease-a-Bike, Cyclis Bike Lease, Fietslease Holland, Hello Rider, MKB Lease, Univé and Dynamo Lease*.
  • Germany: JobRad, Lease-a-Bike, BusinessBike, Deutsche Dienstrad, Mein Dienstrad, Eurorad, Bikeleasing.de, and RIDE*.

Important notes when applying:

  • Key / Serial Number:
    When submitting your lease application or registration, enter your lock’s serial number in the field asking for a key number. Because some leasing portals still rely on traditional key codes, your serial number acts as the unique identifier.
  • Proof in Case of Theft:
    Because the TMD Chain Lock is keyless, you do not need to hand over physical keys if a theft occurs. Instead, export or take a screenshot of your digital history (log file) directly from the TMD app. This digital log serves as official proof that your bike was locked at the time of theft. Our team is always ready to assist if you need support extracting your lock history.

*Is your leasing provider not listed? Please check directly with your leasing provider or contact our support team, we are happy to help verify compliance.

When will I receive my order?

We aim to dispatch all orders within 2-3 business days, so you can get your security sorted without delay.

Can I return my product for free?

Not the right fit? Return your unused product in its original packaging within 14 days for a free refund. Just contact our support team to get your return label started.

How long is my warranty?

We provide a two-year warranty on all products to ensure your security never misses a beat. Just contact our support team and we'll take it from there.