1. just buy an economical replacement wheel with more spokes and chalk the expense to experience. There is more downside than upside to 28 spokes for a rear wheel that carries panniers. Sure a well made wheel with 28 spokes can work but you don’t have a well made wheel. The cost of a rebuild at a shop using new spokes will get you half way or more to an acceptable new wheel. I don’t know if QBP has your wheel but I find them well built. I had a bike shop in the 80’s and built a few wheels beside my own.


2. Then use your old wheel as a learning opportunity and rebuild it on your own. This will give you some understandimg how to identify a poorly made wheel right out the gate and prevent the kind of problem you’re having now. Unless these are somehow flawed spokes. It’s possible but not something I experienced compared to frequent spoke breakage due to overloaded bikes on poorly built wheels that were poorly built from day one. Besides it’s always good to have spare wheels