I recently bought an IRD freewheel and after 2 months it is broken. It worked great for about a month and then developed a "clunk sound" and then quit working altogether. I have a friend who had an IRD and it lasted three months. I ride a vintage Cuevas with a Campy Rally in the rear and am looking for an older freewheel as the IRD freewheels don't seem to hold up to hard climbing and sprinting. The good news is the store I bought it at exchanged it for a new one the dayI brought it in to them.