Originally Posted by
ericm979
The spokes probably won't pull out catastrophically.
But the nipple will pull through the rim where its cracked and detension the spoke, causing the wheel to become untrue.
It's time for a new rim. If the hub is good you can get your LBS to lace a new rim to that hub.
+1. I'm sure there are many people out riding with cracked rims and don't even know it. I'd replace the rim asap but you can still ride it for some time.