[python] Re: Rear Suspension
- From: George Durbridge <gdurbrid@xxxxxxxxxxxxxx>
- To: python@xxxxxxxxxxxxx
- Date: Sun, 27 Feb 2011 16:23:42 +1100
For those of you who read German, there is a very good paper on bicycle
suspension at:
http://wstiffel.homepage.t-online.de/F%20e%20d%20e%20r%20u%20n%20g-7.htm
For those who don't read German, the online translations of this paper
are pretty bad, but you will get some sense out of them.
In answer to Jurgen's question, I can't answer about a Python, but I
have ridden two recumbent tricycles long distances, one with rear
suspension, and one without, and otherwise very similar. I find that a
stiff rear suspension doesn't make a lot of difference to comfort (which
is also what Dr Stiffel would tell you). The suspended frame has lasted
over 20,000km. The non-suspended trike had a fatigue break in the right
chainstay at about 15,000km, but that was due to pedalling stresses.
The best advance in suspension I have encountered in a long time was a
set of Schwalbe Big Apple tyres. If you run them soft (2 or 2.5 bar),
rolling resistance is still surprisingly good, and comfort over gravel
is outstanding. They are light and seem resistant to punctures. The
tread is shallow and how long they will last, I don't know. Schwalbe
have other similar tyres in their Marathon range, see their site
(English and German):
http://www.balloonbikes.com
On Wed, 2011-02-23 at 11:21 +0100, Jürgen Mages wrote:
> Hello Rod,
>
> it is not a bad idea to leave out the rear suspension. Considering the
> mount of effort, weight and the possibility of failure it seems not
> really worth to include a rear suspension.
>
> So, I am thinking of revising my building side:
>
> http://www.python-lowracer.de/construction.html
>
> The goal is, to simplify the building process and to save weight.
>
> As I never rode unsuspended Pythons, I am curious to hear some
> experiences from you and other riders. Any cracks of the rear frame yet?
>
> Cheers,
> Jürgen.
>
> On 22.02.2011 01:35, r.mccrady@xxxxxxxxxxx wrote:
> > My wheel base is 114cm, with 26" (mountain bike standard) wheels. I
> > built it following the P3 instructions from Jurgen, but I didn't
> > include the rear suspension.
> >
> > -Rod McCrady Los Alamos, New Mexico, USA
>
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