I searched the Forums for any info on pedal adapters... all the posts were looking for adapters that would reduce a 9/16" pedal to 1/2". These are available but very expensive. My problem was that I wanted to go the other way- 1/2" to 9/16" so I could use a repop set of Peason teardrop pedals with a 1/2" shaft on my 3 piece 9/16" cranks. Ebay occassionally has a set of 1/2' pedals with 9/16" adapters.......... for Eight Bucks! (plus shipping- $15). The set is called "Bell Universal Fit Comp Bicycle Pedals". If you do a search on either Ebay or the net, you should find these. 