I am confused - I thought a chain tensioner was just a derailleur pulley type thing for use on singlespeeds - I'm riding fixed (I don't think I mentioned this), on a track frame with horizontal dropouts. Are you talking about something else - a tool or something to set the tension?
Thanks for the help.
They work if you do in fact have a track frame with track ends (not horizontal drop outs). A tug-nut (chain tensioner) sits on your track ends and pulls the axle back.
