Technically, no. But I did a 27 to 700c conversion on my bike. Even after some very clever measurements (I was going to have the bosses re-brazed) they still wouldn't have worked for my frame.

However, I'm going to try tektro's if I come up with a decent used set, and ill most likely file them a bit for fit. I didn't have the heart to file the 550's although they may have worked.

Luckly, my existing brakes (old diacompe cantis) still worked, I just continued to use those. They work fine, I'm just worried about busting a spring on them someday, and then not being able to replace it.