Originally Posted by
Marcus_Ti
Hard to do for a few reasons:
-SPD pedals are fairly open to aid in mud shedding-hard to get a strain gauge in there
-SPD is intended as an MTB pedal...considering how badly beaten up MTB pedals get when used for MTB....it wouldn't last long...hence the pref for crankarm sensors
-MTB pedals (overwhelmingly) have the shoe tread resting on the pedal by design, making measurement error prone I'd wager...as opposed to say LOOK style cleats that bear 100% of the pedaling force.**
**Only MTB pedal I know of offhand where the only contact between shoe and pedal is the cleat (like in road shoes), is the Speedplay Syzr.
Hmm, I thought pedal meters measured pedal spindle deflection, and so would expect the shoe/pedal interface doesn't matter.
Were I guessing, I'd say it's more to do with the challenges of dual-sided design, bit I don't know.