...In 1903, Heinrich Wittler founded his own bicycle factory and began production there. Among other things, he invented the "Wittler Patent Bottom Bracket." In 1938, Heinrich Wittler Jr. developed a special safety crank for industrial use, particularly for the military and mining sectors, which had a demand for this innovative safety crank. Wolfgang Wittler subsequently focused on the production...
Wheel tensioning, lacing of bicycle, motorcycle, car rims, and electric motors. Manufacturing spokes according to a sample.

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