Hello Stephan The triangular plates are srewed, so it is very easy to change them for a other geometrie. The driving stability is different to the 26" model, but not in a dramatic way, the handling of both model`s is very similar. The dualdrive wheel and some other parts are from a used standard upright bike. Here the technical data in cm 26 " seat : 31 28" seat : 44 BB : 51 BB : 61 Wheelbase : 121 wheelbase 127 Pivot : 63° Pivot : 65° by Wolfgang "Stephan Schöling" <mailto:stephan@xxxxxxxxxxxxx> schrieb: > Hello Wolfgang, > > very nice work, looks quite professinal. > > Are the triangular plates at the rear suspension riveted or screwed ? > > I see that the seat and the BB is placed higer, so you have reduced the > distance between them. Does this take any effect to the driving > stability in comparision whith the 26" model ? > > Where did you get the dualdrive wheel ? > > Can you send us some technical data, like wheelbase and so on ? > > Thank you very much, > Stephan