Originally Posted by
Riveting
TWO gears is the right answer. One for the flats at 80 rpm (at endurance output of 80% of FTP), and one for steepest uphill YOU will encounter at 80rpm (at endurance output). Anything more than TWO is just for ease or speed. If there's no hills (aka Florida), then ONE is the right answer.
I don't know how many is "too many" but I have determined that two is the minimum required for mountain biking, if, as you say, I want to ride both up and down the hills.
