In 1988, the first prototype of a bottom bracket shifting system was created which, thanks to a reduction of 2.5 times, was able to more than double the existing gears of a derailleur or hub gearshifting system, thus creating a transmission ratio range that hardly any other shifting principle was able to achieve.
Picture right: mountain-drive with reduction 1:2.5
The speed-drive transmission creates more speed: at the push of a button, the chainring rotates 1.65 times faster.
Again, no cables or rods are required for installation. A simple kick on the gear knob switches up or down!
In 2011, the German Haberstock-Mobility GmbH buys the entire production including warehouse and patents.
If you have any questions about one of the bottom bracket gears, please contact info(at)haberstock-mobility.com.
Picture on the right: Training in our factory in Vilters: the patron Rolf Haberstock himself stands at the lathe!
