Originally Posted by
HillRider
. . . several pedals have wrench flats wide enough to accept a standard 15 mm combination wrench. My Speedplay Frogs, Shimano M535 SPDs and an old pair of SR quill pedals can all be installed/removed with an ordinary Craftsman 15 mm combination wrench. Other models do require the special thinner pedal wrench. Upshot; check your particular pedals before buying a specialty wrench.
+1 on that. I was kind of surprised when I got a pair of Crank Bros Eggbeaters, that they had no flats for a wrench (combination or pedal). Took me a minute to realize that the pedal spindle has a hex recess for an 8 mm (IIRC) Allen wrench.