Originally Posted by sivat
ummmmmmmm... i think you're backwards on this. The higher the gain ratio, the slower the pedals will be spinning at a given speed.
Yes you are right, but sers gave me the answer. What I thought is that the bicycle is going to "drive me" foward and not the other way arround. So if I have a fixed gear I have to slow the bicycle on descends if I have a small gain ratio. But, according sers, the 5.5 mark on the gain ratio is also enough for descends.