Neon shaking when driving low speed what is cause?

Hi so i noticed today while driving at about 25-45 the car has this annoying minor shake when i drive its not a huge shake but it seems like it wobbles the car a little, at about 50 i ride smooth and there is no shake but the shake comes back when i decelerate, i just got new tires on the front and balanced them so i doubt it is not those it has to be the rear tires, today while driving my cook told me that my passenger wheel had a little wobble in it not huge but a little? any idea anyone?