Roof Rail

Roof rail: Automatic or manual tolerance compensation

Tolerance compensation with optimized force distribution

WITOL tolerance compensation systems offer advantages in the fastening of large and tolerance affected components. The roof rails must be firmly connected to the roof structure of the car body at several screw points. By using WITOLs, the component is fastened tightly and without tension.

Fastening solutions from WITOL are used for laser-welded roofs as well as for roofs with a roof channel. The cavity between the roof cladding and the supporting structure is precisely compensated by WITOL so that the railing is fixed and load-bearing.

WITOL roof rail fixation

Two systems for roof rail mounting

Single-stage assembly

The WITOLs are inserted at the joints of the roof cladding. During assembly, the screwing process activates the WITOL and automatically compensates for the tolerances between the inner roof structure and the outer roof cladding.

Two-stage assembly

Unlike single-stage assembly, the compensation of tolerances is activated by a special tool. This results in a precise sleeve that is compatible with the bolt / nut system of the component. The railing is then conventionally screwed in place by means of a stud bolt or screw.


By loading the video, you agree to YouTube's privacy policy.
Learn more

Load video

Roof Rail Assembly

All the information compact.
Our free Roof Rail Whitepaper.

Learn more about Intelligent fastening solutions for roof rail assembly.


Mockup Whitepaper Roof Rail

These WITOLs are used for roof rails

  • WITOL 350

    Only a very small installation space is required for the WITOL 350. This means that even a very flat roof rail can be implemented without any problems.

  • WITOL 311

    The WITOL 311 can also compensate tolerances in the Z-direction between two components and also enables angle compensation.

  • WITOL 287

    The WITOL 287 allows the installation of a narrow roof rail with a small roof cutout due to its space-saving design.

Your individual project – our innovative solution!

With WITOL Individual, you receive a fastening solution that is 100 percent customized to your application and interface. We carry out your project from the initial concept to series production. In doing so, we precisely implement your specifications and develop custom-made special solutions for you. You benefit from our many years of experience and expertise in the field of tolerance compensation systems.

Do you have any questions?
We are happy to help you.