Originally Posted by
Joetom
these tyres often touch down on same/similar spot and makes tyres/wheels more out of balance and even more vibs.
Although the wheel might well stabilise at the same point each time, touchdown is a gradual process, as soon as the first fractional contact is made the wheel will rotate, before any substantial weight is applied.
Have a look, for example, at some first-ever touchdown marks on a brand new runway and you see just a little wisp of rubber, building up progressively to the heavier marks well ahead as the weight and resistance increase, by which time the wheel will have performed several full rotations.