My bottom bracket doesn't always feel smooth. I can't hear anything but in my feet I feel a bumpyness. Both pedals, around the entire rotation. It doesn't always do this, just occasionally. Is this a bearing ball that is not smooth? I can be fine with it as long as I'm not messing it up worse by riding it.
It's a bike shop Schwinn Express '96 or '97. Chromoly frame hybrid.