my rear wheel has a constant bump whenever I ride . I've done all that came to mind at firs. Deflated and checked the tire , checked the axel for bends , checked the ball bearings , made shure the break is not rubbing and that the wheel is properly tightened on the frame .
One thing I did notice is that when I spin it in my hand I can feel the ball barings sort of lightly scratching with the axel ? I know that can be a problem for them but could that also cause that constant bump ? Any solution you have would be welcomed to check out .