Tool Chain Tool Workshop ROHLOFF Bike Manufacturer of high quality cycle components, such as hubs with internal gearbox, chains and products for the workshop. Rohloff AG is a German company based in Kassel Fuldatal. Founded in 1986, the story of Barbara and Bernhard Rohloff's company begins with the production of the S-L-T 99, a chain that was very innovative at the time. The brand has expanded and become famous all over the world.