I am sure i posted this question in this forum before but I can't find it now
I want to put a hub gear on the rear wheel of my 20" folding bike and would like to add 3 gears up front to give me a better spread. I am hoping that by carefully choosing the cog in the back and matching it with 3 gears up front I can keep the chain up high off the ground. I have looked at some 20" bikes with rear deraillers and some of the chains look like they are only 2" from the ground - too low.
Is it possible to do this? I want three gears up front.