Yeah, sounds like the spoke tension has pulled it through. It can happen on older steel rims; they corrode and then the rim can't resist the tension anymore.|
Can happen on alloy rims through a combination of metal fatigue and impact.
Best get a new one.
#9320366, By MikeP The cycling thread
MikeP 2,777 posts
Seen 5 hours ago
Registered 14 years ago