Hi all, new here. I bought a used bike and it came with clipless pedals. I've never used those before, so I'm looking into what shoes to get. The guy I got it from said it had SPD pedals, but it seems there's SPD and SPD-SL. My question is this, is the "SL" a distinction only in the type of cleats, or are they different pedals? Basically, I'm not sure what type of cleat to get to match my new pedals. Thanks for the help.