[python] Re: Hub gears

  • From: "Marc Huebner" <marchuebner@xxxxxx>
  • To: python@xxxxxxxxxxxxx
  • Date: Wed, 04 Aug 2010 23:17:08 +0200

Hi all

As an inspiration a picture of my selfmade excentric bottom bracket of my 
airbike.

Marc


-------- Original-Nachricht --------
> Datum: Wed, 4 Aug 2010 08:58:08 +0100
> Von: "Boyd, Mark" <mark.boyd@xxxxxxxxxxx>
> An: python@xxxxxxxxxxxxx
> Betreff: [python] Re: Hub gears

> Hi Gerald
> 
> Thanks for that. It is good to know that it can be done. Have you gone for
> an eccentric bottom bracket, or haven't you found chain tension to be an
> issue?
> 
> Cheers
> 
> Mark
> 
> -----Original Message-----
> From: python-bounce@xxxxxxxxxxxxx [mailto:python-bounce@xxxxxxxxxxxxx] On
> Behalf Of Gerald
> Sent: 03 August 2010 21:11
> To: python@xxxxxxxxxxxxx
> Subject: [python] Re: Hub gears
> 
> Hi Mark,
> I use a SRAM 9-Speed hup in my python and it seems all right. It even has
> a coaster break - nice thing, you do not have to put your hand to the
> "handlebar" to break.
> I think it is not a big issue with the weight of the hub while you ride
> the python. Your legs left and right of the hup will weight a lot more than
> the hub.
> As far as I know, the iMotion9 I use is even heavier than the Rohloff -
> albeit not as noble.
> If the hub has a reasonable price, I would sugget to go ahead and get it.
> 
> Best regards
> Gerald
> 
> 
> The only point I would
> 
> Boyd, Mark wrote:
> > Hi Everyone
> >
> > A friend of mine has a Rohloff speed hub that I am thinking of buying 
> > for my python project. If I include an eccentric bottom bracket, it 
> > shouldn't need any other chain tensioning device, and may even work 
> > with a chain case. This should make for a very tidy drive train.
> >
> > Other than the silly price tag that this would come with, can anyone 
> > think of a reason why this wouldn't work? In particular, although I am 
> > prepared for the inevitable bruising that learning to ride will bring, 
> > do you think that having such a heavy hub will increase wheel flop and 
> > so make the learning process even harder? If so, would you advise, 
> > say, adjusting the steering head angle and if so to what?
> >
> > Thanks in anticipation.
> >
> > Mark
> >
> >
> >
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Marc Hübner
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