My wife is having some right leg pain, probably contributed to by the excursions made by her right knee. That having been said were making some adjustments and the PD-M540 Shimano SPDs seem to have much more offset than her relatively small feet require. I've measured 53mm from the outer surface of the pedal spindle to the center line of the cleat. So I'm looking for pedals will a reduced offset.
While this is not a tandem-specific question, it may be a more common issue for the tandem stoker position since the stoker is usual less than average male height and the Q-factor may not be all that favorable. I doubt moving the pedal centerline "in" will cause any other issues with the heel striking either the chainstays or the cranks.
I'm looking around on the web, but pedal drawings seem a bit hard to find. Definitely would like to stick with MTB-style pedals, but they don't have to be SPDs. Any and all suggestions gratefully accepted.