a chain tensioner like this:
I recently purchased the single speed conversion kit (last one) so that I could convert a freehub body to a single speed. The chain tensioner works great and has enough adjustments to really fine tune everything. I have been working on another frame which also needs a tensioner and I'm trying to put it together as cheaply as possible. Has anybody used either of the first two? I like the idea of having a toothed gear, but the Rubber pully seems like it would work just fine.
Anybody using them, any opinions on either of them? I have tried to go without a tensioner, but I just don't have any ratios that work tight enough.