wheelsgoround said:"MartinM" <[email hidden]> wrote in message
news:[email hidden]...Quoted message said: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
Quoted message said:Quoted message said: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
Quoted message said:Quoted message said:of ratio should I use?
TIA
That's a matter of personal preference really; it depends on how fast
you go
Quoted message said:and how fast you like to pedal.
As an example, let's say you ride at an average of 24kph and your
preferred
Quoted message said:cadence is 80rpm. That means each pedal revolution needs to take you
5m.
Quoted message said:Assuming your wheel circumference is 2.2m then you need a ratio of
2.27. A
Quoted message said:42 chainring and 19 sprocket would be close enough.
sounds about right, thanks