Originally Posted by
gregf83
That's what I use for commuting in the winter. Have to spin up to 150RPM going down a short steep hill in the morning. It works fine for commuting but not very good for a fast group ride. Also not so great when you want to do an easy tide and have a hill to climb. Decent training though.
How fast does the OP need to go?
42T X 12T 700C X 23MM = 40KM/HR @ 90 RPM & 52KM/HR @ 120RPM
I use a triple crank with a single speed wheel, 24/38/50T X 18T.
I spin out at 50KM/HR, more than sufficient for my (flat terrain) needs.