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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!

The extreme translation into the fast is the high-speed drive. At the push of a button the chainring turns much faster, i.e. a small, light and compact 27 chainring has the effect of no less than 67 teeth!

In 2011, the German Haberstock-Mobility GmbH buys the entire production including warehouse and patents.

In the meantime production and sales have been taken over by the company Kwiggle-Bike.
Contact:  info (at) kwiggle-bike.de