So I'm doing my chain last night and when I was spinning the wheel, I noticed there was a lot of play in it. I guess it would be the bearing or something? I'm new to bikes so I don't really know what the inside of the centre of the wheel looks like but I could move it side to side quite a bit. around 3 to 4 mm. This isn't normal is it? Its an 89 wheel on an 85 by the way.