My first post here at bike forums, but i have been lurking for a while now. I have a trek 820 which has sat idle for many years and I've decided to get it ready for commuting to school in the spring ( i now drive the 3 miles...i know, i know). Anyways my plans include a complete take down, repaint (there is some rust) and a rebuild. My main question to you all was in reference to the gears. I am not a fan of gears and was thinking of scrapping the rear gears. My plan was to leave the 3 gears on the crank and the front derailleure and and scrap the entire rear gear assembly. I can get away with this because my route is entirely flat. My question is what should i replace the rear freewheel (cassette? trek says its a Sunrace 13-34, 7 speed cassette) with? I want a single gear, do i need a whole new hub or can i just buy one cog?
Thanks in advance for the help.
I also want to mention that although the entire rebuild seems extreme, i don't often get a chance to do as much mechanical work as i want, so this is a long term/fun project for me.