Rob, Good question! I agree with Jan. There is wide variation with the python seat angle. Partly it depends on the height above the pivot, which varies, and partly on what the builder had on hand when that problem came up. I guess most builders use the P3 as a sort of standard since that is the most clearly described of the python designs. My seat angle was close to 30 degrees but now I am raising the seat so it may be less. To measure I just use a short level and a protractor, but then I don't care so much about the angle as long as it feels OK and I don't slip off the seat! Maybe some room for adjustment would be good, as on a traditional bike. I fiddle with the seat quite a bit on a new seat setup on my other bikes, on the python not so much. Kurt On Tue, Apr 5, 2011 at 4:24 PM, jan <jlaube@xxxxxxxxxx> wrote: > Hi Rob > It seems to me that all you need is a protractor and lots of pictures of > pythons. Then measure the angle of the mid part of the seat from the > horizontal. This method gives the same results as a number of manufactures > specs. > Good luck > Jan gu > > *From:* Rob Raymakers <r.raymakers@xxxxxxxxx> > *Sent:* Tuesday, April 05, 2011 2:18 PM > *To:* python@xxxxxxxxxxxxx > *Subject:* [python] Re: Abs workout from python? > > Hello, > > i'm gathering specifications of the diffirent parts to build a python bike. > I got all the sizes/angles/measurements but I can not find how to > calculate/measure the angle of a seat. Searches on the internet only give me > a range between 19-30 degrees, but not how to measure the angle. Can anyone > explain it to me so i can finish my 3d model. > > Rob > -- Kurt Rutter, RN, MSN Kauai Community College Nursing Department krutte@xxxxxxxxxx cell: 631-9131 (\_/) (0.o) (___)o