Originally Posted by
Metric Man
I used to use the Standard M520 Shimano pedal and all my bikes had this type of pedal. When I got the New bike- I ordered the A520 pedals. Same cleat as the M's but a couple of changes in that the pedal is only one sided and the Pedal is longer to give a better base for the foot to rest on. I did not realise that I used to get foot pain- till I did a ride on the old road bike and I had a Dull throb in the foot- That longer Base for the foot does give me a more comfortable foot.
Not that I am going to get them (Yet- and I will need a lot more convincing) but it does seem that the Look Type of pedal and cleat does have some advantages.