Originally Posted by
meanwhile
SPDs aren't really useful for a commute - the real performance gain is tiny. Try BMX platform pedals instead - they stick to your feet like crazy and let your wear almost any shoe. Stick for the crucial lowest quarter of the pedal stroke is very high, so propulsion efficiency is too.
I find that SPDs are a lot more comfortable though, being connected to the bike, its not always about performance. I have two pairs of SPD walkable shoes, one being sandals, and both are comfortable. I put SPD one side/platform other side shoes on my commuter in case I wanted to ride in other shoes but I hardly ever do.