tedee – modular cylinder GERDA SLR 30-61mm / 37-68mm

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Would you like Tedee Lock smart locks, but your existing lock does not meet their installation requirements? The GERDA modular cylinder solves everything.

The high-quality all-metal modular cylinder GERDA fits all locks of any length with the euro profile and you can manage its installation yourself in half an hour thanks to a detailed manual. Its unique design allows you to use both smart and classic locks at the same time: you install a smart Tedee Lock from the inside of the door and the classic key lock remains on the outside.

GERDA cylinders are very safe and have a certification of 6 class of the European safety standard. If you install GERDA cylinders on more doors, it will allow you to unlock them all with the same key. You will not have to constantly pull out a large and ugly bunch of keys.

Install a GERDA cylinder and give the green light to smart homes.

• Adaptation to any length of lock with euro profile
• certification of 6 classes of the European safety standard
• Possibility to use smart and classic lock at the same time

Availability: On the way from the manufacturer

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Smart home, made simple

If you want to equip your home or office with Tedee Lock smart locks and you have found that your existing locks do not suit the installation, do not despair. All you have to do is install the GERDA modular cylinder, which will fit all locks of any length with the euro profile. Installation is very easy and thanks to a detailed user manual, you can do it yourself at home in a few minutes.


High variability

Manufacturers can boast a long tradition and experience in the locksmith industry and the GERDA cylinder is thus perfectly processed in all aspects. The unique design allows you to install a smart lock on one side and a classic lock on the other. Thus, each member of the household can use the variant that suits them better.

Safety first

With the GERDA modular cylinder, you can rely on high material quality and security. This cylinder complies with the certification of class 6 of the European safety standard and thus ensures you perfect safety.

Install the GERDA modular cylinder yourself. An elaborate manual will guide you through the installation step by step. Or check out the tutorial video tutorials.

In this video, you will learn how to uninstall the old cylinder (no need to remove the entire fitting to install the liner)

Here you will see how to measure the length of the cylinder.

In this video, we will show you how to adjust the length of the cylinder to suit your door

and here you can see the actual installation of step by step


  • tedee - GERDA cylindre

    Feature overview

  • Highly reliable
  • All-metal
  • Unique construction
  • Possibility to use smart and classic lock at the same time
  • Adaptation with any euro profile

  • Technical specifications

  • Dimensions to be measured: 30-61mm / 37-68mm
  • Made in EU
  • European Safety Standard Class 6 certification
  • Installation instructions: PDF
  • Colour: silver

  • logo Tedee

    Tedee combines progressive IT technologies with many years of experience in the classical mechanical locksmith industry. With more than thirty years of experience in the market, they are still open to the latest trends in technological development, resulting in a new generation of unique, innovative and high-quality products. Tedee's development team consists of experts in cloud software, mechanics and product design, taking their smart products to a higher aesthetic and practical level. The company's goal is to provide the convenience and security of smart locks to any home.
    More Information
    Product code TD-GERDA-3
    Barcode 5902203333037
    Color Silver
    Manufacturer tedee
    Manufacturer's website tedee.com