Originally Posted by
Sixty Fiver
Spokes require that they be tensioned within an acceptable range and most important is that the tension of each spoke is equal relative to the spokes on the same side of the wheel... ...
+1 to what he said.
If your spokes are breaking, it's because they weren't tensioned right. 350 miles is enough to fatigue poorly tensioned spokes (I know this from personal experience) and now they are all destined to brea (and I know this from personal experience, too). Have them all replaced, have them tensioned right, and they will hold up just fine.