Who?

Behind the development of the products shown above is the Cologne (Germany) based company VELOGICAL engineering GmbH. Was that not what you were expecting? VELOGICAL owner Dipl. Ing. Peter Frieden is by profession a developer of wind energy installations, in particular the wind certified turbine Easywind 6 for off-grid energy supply. These have earned the description "stormproof" because they can carry on producing power, unrestricted, even in a hurricane. Before that Peter Frieden directed the vacuum pump development department at Oerlikon Leybold Vacuum. His product developments, protected by numerous patent applications, have been successfully applied worldwide and are outstanding in both their high efficiency and in their reliability and low maintenance. Currently he is developing high efficiency special products to address as yet unsolved technical problems in cycling. 

Seizing the initiative - a way of redesigning a tandem

At the end of our tandem trip along the Lahn in the autumn of 2009, my partner M. and me left behind our 28 "tandem. Without any suspension and with its narrow, hard-edged tires, it lacked all the comforts and on top of that it was not even particularly fast. - I thought, it must be possible to move around much more elegant.

On the weekend of our return we started an intensive Internet search for a suitable successor vehicle. The aim was to find a tandem that runs smoothly over bumpy roads and elegantly around the corner - but unfortunately there was no real hit on the market aviable for us.

The only model that came quirte near to our expectations after a long search was a lonely no-name used tandem. At least, the frame geometry already fitted halfways into our concept. Our "suffering" was great and so we went on the same weekend to Nuremberg to pick up the vehicle there. With tools, welding and lathe the rear head tube was improved. Then the tubes were repainted and then the wheel was completely rebuilt - of course with new and better components. The result proved gave us the feeling of a giant step in the right direction and in the following time I was still optimizing the wheel and tire combinations decided to reduce the rolling resistance.

After the experience of this project study, one and a half years later, I invested time again in order to optimize the tuning of the frame geometry. The goal was to crown project with a new tandem from a single source and to bring it to perfection. This time I needed a professional framebuilder. With Dietmar Hertel, which I would like to thank again at this point, I found the specialist who is well known not only for outstanding prototype framework., He advised me competentely in many technical matters, last but not least he helped with the selection of high-quality components with  optimum performance ratio for a tandem and low weight. The masterpiece of this process is now named COMPACT Tandem.

Construction / installation: VELOGICAL engineering GmbH, Dipl. Ing Peter Frieden, Cologne

Prototype: Dietmar Hertel, known german frame builder, Rhineland

Series production: Stefano Agresti, Italian specialist for frame construction

in 3 Generation of the family, Rhine-Main area