Hi Jürgen, Could you share more info on the PX.5, do you have more pictures? How did you get the pivot so far back and the seat in front of it? I'm trying to compare with the frame geometry calculations to see if it makes sense. Thank you! Cris (beginner!) > Hello Kevin, > > I thought this too - until I built the PX.5, an experimental prototype > where the pivot was moved 25 cm further back than the normal position: > > http://python-lowracer.de/pics/Python%20PX.5.jpg > > PSI was clearly noticeable and the bike was hardly rideable. > > Cheers, > Jürgen. ============================================================ This is the Python Mailinglist //www.freelists.org/list/python Listmaster: Jürgen Mages jmages@xxxxxx To unsubscribe send an empty mail to python-request@xxxxxxxxxxxxx with 'unsubscribe' in the subject field. ============================================================