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madcockney · 06-10-13, 08:58 PM

For those with Android phones can I suggest that you download the "Calcola Rapporti" app from the play store. This not only gives you your particular make and model of bike, but what the speed is in each gear at any RPM you specify, and what that will be if you change the sprockets. Note use this as indicative only and also does not allow for any slippage of the tyres etc. For instance the speed that RH mentions with 14/44 sprockets, (and standard wheels/tyres), you would achieve, according to this app, at 9250 rpm, which I would have thought was different to the actual revs that RH was actually doing

06-10-13, 08:58 PM	#16
madcockney Member Join Date: Jul 2009 Posts: 131	Re: rear sprocket size For those with Android phones can I suggest that you download the "Calcola Rapporti" app from the play store. This not only gives you your particular make and model of bike, but what the speed is in each gear at any RPM you specify, and what that will be if you change the sprockets. Note use this as indicative only and also does not allow for any slippage of the tyres etc. For instance the speed that RH mentions with 14/44 sprockets, (and standard wheels/tyres), you would achieve, according to this app, at 9250 rpm, which I would have thought was different to the actual revs that RH was actually doing