I must have some luck! I have had two campagnolo rear hubs fail on me in the last six months! The first was a 70s vintage campy record hub with about 5000miles (by me, and who knows how many before that!). The second was a hub sold to me as a grand-sport but more likely an 80s vintage chorus (going by velobase). The flanges failed on both of these (see pics below).

Each time I heard a *ping* and had a sudden loss of wheel true as the wheel rubbed the chainstay. I was going slowly enough each time to avoid a spill (coming away from an intersection).

I have two questions: 1) Is this just a coincidence, or is there an underlying common cause to these two failures? 2) How, and how quickly do I have to unlace the rims to keep them from being permanently damaged?

Chorus:
Record: