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After throwing my chain and unintentionally flat-spotting my brand new tire on a high-speed, 50-foot skid the other day, I decided it was time to make another chain tensioner for the forward-facing dropouts on my newer fixed-gear bike.

Here was my first attempt.  I used two eye-bolts, a bracket, and two nuts on the first one.  But that involved a lot of work any time I needed to remove the rear wheel.  And the two eye-bolts took up lots of space on the axle.  So, why not go with just one?

And it totally works! The bracket was an L-shaped one with a single hole on each side.  The shorter side was sawed off so it would fit behind the axle.  And the bracket sits on the relatively flat part of the dropout (where the original derailleur tensioners stuck out).