i've been unsuccessfully searching on the website and the forum, i seem to recall the gear pedal topic was discussed in the past. it's hard to tell from your pictures and then walking to either of my bikes to compare your pics to pedals on my bikes. i know there is a couple posts in Mark's #97 build, but i did not see any information i would call conclusive. i would hazard a guess the straight pedal is the one you want. the curved pedal on the left looks like a later pedal and also has an unoriginal bend at the toe piece.