OK ... I'm not really good at talking about numbers but I'll try to do this ...

It seems like riding a multi geared bike to figure out what ratio you are comfortable with wouldn't work because you have the longer chain and the derail-thingy. Everyone, myself included, defends single speed bikes by saying, among other things, you can run a bigger ratio and not have to work as hard to do as you would on a multi-geared bike, right? Does anyone know how to calculate how many gear inches you gain running single speed?

Sorry if there is an obvious answer to this but my brain doesn't do math so well ...