Originally Posted by Dynocoaster
I just purchased a Trek 1000 older model and would like to keep the crank set with both gears. I have seen where there is a fixed rear hub with a derailleur but I cannot find an article on how to do it. Any help would be appreciated.
This is singlespeed/fixed gear (emphasis being placed on the "single")
Fixed hubs generally do not work with derailer mounted chain tensioners, which would be required to use both front rings as the difference in size would cause signifigant chain slack.