M
MartinM
Guest
wheelsgoround wrote:
> "MartinM" <[email protected]> wrote in message
> news:[email protected]...
> > I have an old racer which I use for taking on the train, and am
> > thinking of doing a cheapo fixie conversion (ie just put the chain
on
> > one ring and use the small ring at the front). It has Horizontal
> > dropouts so chain tension not an issue. For general commuting what
sort
> > of ratio should I use?
> > TIA
> >
> That's a matter of personal preference really; it depends on how fast
you go
> and how fast you like to pedal.
>
> As an example, let's say you ride at an average of 24kph and your
preferred
> cadence is 80rpm. That means each pedal revolution needs to take you
5m.
> Assuming your wheel circumference is 2.2m then you need a ratio of
2.27. A
> 42 chainring and 19 sprocket would be close enough.
sounds about right, thanks
> "MartinM" <[email protected]> wrote in message
> news:[email protected]...
> > I have an old racer which I use for taking on the train, and am
> > thinking of doing a cheapo fixie conversion (ie just put the chain
on
> > one ring and use the small ring at the front). It has Horizontal
> > dropouts so chain tension not an issue. For general commuting what
sort
> > of ratio should I use?
> > TIA
> >
> That's a matter of personal preference really; it depends on how fast
you go
> and how fast you like to pedal.
>
> As an example, let's say you ride at an average of 24kph and your
preferred
> cadence is 80rpm. That means each pedal revolution needs to take you
5m.
> Assuming your wheel circumference is 2.2m then you need a ratio of
2.27. A
> 42 chainring and 19 sprocket would be close enough.
sounds about right, thanks
