Originally Posted by
PaulGrun
Earlier this year, she went to a platform pedal for a while in order to help solve a possible knee problem (she has an artificial knee), but hated it so much that she went right back to the SPD. The problem was that, with the varying cadence, she had trouble keeping her foot on the platform. We're one of those teams where the stoker stays clipped in all the time, except for potty breaks. Works for us.
One pedal she may wish to consider is Speedplay Frog. Recessed cleats and no rotation resistance. I have so-so knees and I find Speedplay Frogs a blessing. My wife has better and very flexible knees and she prefers regular SPD cleats as she finds out she pops out of the Speedplay pedals too easily while she is pedalling.
The main downside of Speedplay pedals for me is that the cleats wear out fairly quickly. I have to replace my Speedplay cleats every year.