> How are you supposed to rotate radial tires. Back in the dark ages we
were
> told to only rotate front to back so the tires always rolled in the same
> direction. Ply separation was 'sposed to result if the rotation got
turned
> around, hear that Firestone. Bias plies had that rather complex rotation
of
> front to back with crossover and one into trunk that I never could commit
to
> memory. Anyway, are we 'sposed to rotate side to side as well as front to
> back with radials, now?? If we are, why is it suddenly okay with
radials??
> I had ply separation when I did the old style bias rotation with my first
> set of radials.
>
> Aloha
> Peter O
All of my info is 5-10 years old now, but all of the manufactures back then
recomended the cross rotation you mentioned.
for a four wheel rotation it's |x|. Fronts to same side rear. Rears
crossed to the front.
With a five tire rotation pick a corner, I like right rear. Throw right
rear in trunk, put spare in it's place (don't bolt on) then do the 4 wheel
cross rotation.
We had customers out in western Virgina (not West by God) that still used
bias, but they were few and far between. Majority of our customers were
radial buyers. Radial seperations were pretty uncommon. The ones I
remember were driven until the tread was about gone. I saw this in some of
the firestone tread pictures I saw from last summer. The blowouts were
about bald. I saw plenty that had tons of tread left, so not making any
sort of judgement based on this :-)
As to recomended, I have always been told to cross radials and that bias
plys were a no cross. Take a look at some warrenty info
http://www.bridgestone-usa.com/warranty/warr8.htm
Other manufacturers have similar stuff.
Pete H.
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