We have the same model of car I think, Nissan Xtrail I think
right?
I used to have this problem with my car too. The wheel would start
shaking at 100km/hr, continue all the way until around 110+ km/hr
and only stop doing it when I hit 120km/hr. I think it's because
the spoiler at that speed begins to pressure the car down and makes
it stable just by way of aerodynamic stuff or whatever you call it,
but that might be a wild theory.
So, getting pissed with the shaking, I got it sent for balancing
and alignment only, no other stuff done. During that time the
Nissan foreman said they only do low speed balancing up to 80 or
90km/hr. And he said he'd try to do a low balance first to see if
it fixed the problem cos I usually do 110km/hr on Malaysian
highways and that's the speed at which the vibration is
worst.
In the end, the low speed balancing fixed it, but before we got it
done the service rep told me if low speed balancing wouldn't fix it
then high speed balancing at Stamford tires would, and whilst they
were doing the low speed balancing I walked over to Stamford tires
and sure enough one of their mechanics said the exact same thing to
me, "You try the low speed one at Nissan first, if it doesn't work,
you come over we do a high speed one for you"
Hope this information helps, I know how annoying a shaking steering
wheel can be, having endured it myself.
