hey got my tires from one place that doesn't do alignments but got a
lifetime rotation/balance, just did that and now my windstar pulls left, is
it normal for a rotation to throw your alignment off? and is the place I got
my alignment from responsible to do the alignment if the tire config has
changed since they did it? I'd imagine it varies from place to place but how
about in general?
It has to do with the way the plies in the tire are arranged.... In a radial
tire. there is a "belt" layer (or several belt layers) that wrap around the
tire directly under the tread face. These cords (plies) can shift or unravel
allowing the tire to assume an "unnatural" shape... instead of a tube (like
a piece of pipe) it will assume a cross-section more like a foam coffee cup.
As a comparison, roll a piece of pipe across the table and roll a foam
coffee cup across a table and compare their trajectories.
Macpherson strut front ends are very forgiving as far as suspension angle
induced pulling is concerned... tire wear is another matter.
Now... for what surprises me. Didn't the alignment tech road test his
work???? if for no other reason than to make sure the steering wheel was
centered? At the very least, he/she should have noticed any unexpected
conditions and made sure that you were aware of them.
Before I forget... I agree with BYMs prognosis.... swap the front tires side
for side... the pull will either vansih (double whammy) or swtich sides. In
rare occasions, it *may* be the rear tires causing the grief.
"Scott" <homealone.com> wrote in message
"Now... for what surprises me. Didn't the alignment tech road test his
either I mistyped or you misread, I got the tires this summer at an air
force base service station, got lifetime rotation/balance, they dont do
alignments. I brought it to a firestone off base that week for an alignment,
last week I cashed in on my free rotation and now the van pulls to the left,
I stopped by the service station yesterday, they are going to check out the
tires on monday.
I didn't misread... you had an alignment and rotation... the tires have
switched position. To check for a tire pull we switch the tire positions. If
the bad tire was on the rear axle, we might not notice.... moving it to the
front axle would make it noticeable.
It's not magic and it's not rocket science....
Now.... if the alignment and rotation were performed at the same time.....
didn't the alignment tech road test his work???
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