I have a Redline Monocog that I would like to setup for street use. The current gearing is 32/18. According to the gear calculator on Sheldon Brown a 32/12 would be similar to the 42/16 gearing I am comfortable with. I'm hoping I can spend a few bucks and swap out cogs vs signifivantly more bucks to swap chainring and probsbly chain as well. My gut tells me I'll need to upsize the chainring instead.