I have a problem that I dont know what to make of. When I drive, it feels like the tires dont have enough air in them (that feeling that your car sinks into the road a little) but I have been ckecking the air pressure twice a week and they are where they are suppost to be at. In October I had switched to new winter tires and It started in the beggining of january. Could it be the suspension or maybe soft winter tires? I know that the suspension is a little worn out because it has more roll to it than normal but this has a different feel than that.