Has anyone heard of poor fit or worn out cycling shoes causing ITB problems?
Yes, I had this. At least I think so, because changing to another pair of shoes (same brand) instantly disapppeared the problem a few years ago, with no other changes. Is disappeared a verb?
Go to a knowledgeable fitter and have them check for a leg length discrepancy. When I got measured for my new Elite, he found my left leg shorter than my right, which had been causing my ITB to flare up after ~13 miles running (sucked at IMMoo). A few shims under the cleat, and I’m good to go.