Whatever you do, do not use these:



They clip onto spd pedals to make a platform, which seems like a good idea to me, but in this incarnation I find they don't work well. I tried them last weekend and at the first bump in the road my sneakers both lost their grip and left my softer body parts to take on the next bump by themselves. They are not made for that.

My favorites so far are the aero style pedals like LesterOfPuppets suggested, but make sure that the clips are the right size (i.e. big enough). Sneakers need a bit more space than the cycling shoes for which they were designed.