You can get SPDs without the surrounding platform, which is redundant in shoes like those Lakes. The 8100 (and 9100) is still a 2-sided pedal; Shimano also makes a couple of single-sided "roadie SPDs", the ES-600 and A600. I've got the A600 on my stationary bike, and apart from wishing it had more float, it is fine. The pedal has a great reputation. I haven't used the ES-600; it lacks the vestigial rear platform of the A600 (saving a whopping 7 grams); from what I've read that makes it hang differently so it's harder to clip into it.