I have a diamondback response that I got a while ago that I just got to ride back and forth to work. I put some thinner street tires on it and am wanting to convert it into a freewheeling single speed for my daily commute of a few miles. I really just need a project, and this will have to do since I already have the bike. I would like to know which company I should go through or which website would be good to use to convert the bike. I want a solid tensioner and not a sprung tensioner. Thanks for the help.