Medien

RadMarkt.de 2026/01/16
Reading time 1:00 minute

New dates for bicycle expert training courses at the Zedler-Institut

The Zedler-Institut has announced new courses designed to train participants to become bicycle experts. The courses cover both theoretical and practical knowledge.

TOUR 02/2025 and tour-magazin.de 2025/01/10
Reading time 4:00 minutes

That was pioneering work

Together with Robert Kühnen Dirk Zedler developed and launched the TOUR test 30 years ago: Today, the graduate engineer, expert witness and loss adjustor is a leading international bicycle expert: In this interview, we look back on 30 years of TOUR test history and the road bike present

TOUR 02/2025 and tour-magazin.de 2025/01/10
Reading time 7:00 minutes

The beginnings of a new era in road bike testing

30 years of TOUR testing – With measure and courage

30 years ago, TOUR began testing and measuring road racing bikes systematically. This has had a significant influence on the development of the road racing bike. A look back and into the present

TOUR 11/2015
Reading time 1:30 minutes

Is the standard gear ratio 53/39 outdated?

Reader’s question