Kappstein Debuts 2-Gear BB Drive System

BERLIN, Germany – At the ‘Berliner Fahrradschau’ that took place from March 18 to 20, a 2-gear bottom bracket drive system debuted. The maker, Kappstein GmbH & Co KG, claims it to be a revolution. However, the Schlumpf drive offers a similar system. Kappstein’s Doppio bb drive offers improved usability.
Doppio 2-gear bb drive system doubles the number of gears. – Photo Kappstein