Hi there, do you have the same tyres front and rear? A mis match can make the road holding "interesting". And not too old, or low tread depth - I mean nowhere near the legal minimum, on winter type tyres it makes a bigger difference as I am lead to believe to do their job they are supposed to be binned at a much deeper tread. It makes sense - shifting water / snow / mud takes depth. I know lots of people have no clue what tyres are on their cars, all 4 different, and there fine, but then some people turn radios up to make the noises go away too....... Or a mate of mine who couldn't feel a mis-fire on a 2 cylinder 2 stroke motorcycle????? Are your rear shocks ok? Not bouncing around, as that will cause lack of road holding and adhesion too.