I'll make the same suggestions as these guys. First, go to a bike shop and have them explain all about clipless. Then buy whatever they recommend, or order on line if you must, but I think you're best to stay away from those adapter types. I wouldn't trust them either. Remember, you're fastening yourself to the bike with these, and any malfunction could be disasterous.... Your bike could get scratched, bent or broken. Oh yeah, you could get hurt too.

aj