Originally Posted by
williaty
Between two cogs in the cassette. The gaps in the current 8-speed cassette are 13-16% right now and I just don't like it. Yes, I have a very narrow range of cadence and force that I'm comfortable in. Prior knee injuries have left me unable to exert much pressure on the pedals, so I have to spin everything basically at the max I can without starting to bounce.
I wouldn't use 10 sp for touring as I prefer the more rugged 9 or 8 speed equipment. Also it sounds as if you are applying a racer's philosophy when it comes to cadence and effort. Get a range between 20" and 100" and choose your gearing so that you minimize gear duplication.