It is quite a long time ago when the bicycle became part of the traffic, and the number of people using this practical vehicle to get from one place to another in an efficient manner is still increasing. So the bicycle became a helpful friend of man and should be treated accordingly to make sure that it will fully serve its owner with its excellent properties.

     This maschine, which, living under the volition of its owner, is able to transform force into velocity, has to be preserved and cherished. To do this, one needs to understand its nature and technicalities along with the requirements of maintenance.

from: Krumm/Bürger:
"Das Fahrrad - sein Bau, seine Instandhaltung
und Reparaturen"
Leipzig, 1924