Originally Posted by
bluefoxicy
Actually the proper tool for the job costs about $20 (a Park Tool Pedal Wrench), but a $5 15mm wrench does work almost as well (less leverage, wider so sometimes it doesn't actually work--usually it gets the job done).
Agreed. My pedal wrench is actually a long piece of tool steel I milled out. However, for the frequency that I suspect the OP changes pedals, I suspect a cheap wrench (and pipe/rag if needed) will be more than he needs. I'm also willing to assume that the pedals have wrench flats.