Originally Posted by Philatio
I remember seeing a fixed bike from fgg here a while ago (maybe a month or so?) that used a chain tensioner with a piece of rubber + ? added so that when you backpedaled the tensioner would stop at the chain stay and not break off or whatever. I am not really sure that's exactly how it worked, and I looked around the site but I wasn't able to find it again. Just thought I'd throw it out there, so I assume it is possible.
I remember that. I got in touch with that dude; he said the setup worked well, but since he rode it exclusively in London, it hasn't been tested for hill-riding.
Still, I though his testimononial was interesting.