What's wrong with my wheel? Thumping feel when braking (Possibly resolved)

[StressStrain]

Originally Posted by osbk67

Is the thump happening once per wheel rotation?

If so I’d ride it as slowly as I could to try to identify _where _ the rim is thumping.

Or walk push bike under front braking to do so.

Identifying the where should greatly assist the what.

I suspect it’s an imperfect rim joint.

^ very good advice here. Find where the thump is in the wheel's rotation.