Re: New tires for a 2002 Saab 9-3 SE

"Charles C." <c.k.christacopoulos.removeme.@[EMAIL PROTECTED]
> gurgled happily,
sounding much like they were saying:

> Adrian wrote:
>> "Charles C." <c.k.christacopoulos.removeme.@[EMAIL PROTECTED]
> gurgled
>> happily, sounding much like they were saying:
>> 
>>>> I am in the market for new tires on my 2002 Saab 9-3 SE because the
>>>> Yokohama Avid's have developed a slight ripple on the outer edges
>>>> which causes a loud noise as I drive. The service reps at my dealer
>>>> said this was caused because they are directional tires and the way
>>>> the car is engineered the tires are being pulled and I should try to
>>>> buy non direction/channel tred tires.
>> 
>> <cough> Bollocks. Complete and utter bollocks. I'd be checking the
>> tracking. Properly.
> <snip>
> 
> <cough> <cough> since you replied to my message ;-)
> 
> What do you understand by riple?  I understand a wave effect but you
> understand a worn edge.

It's entirely possible for the tracking being out to wear the outer 
edge's tread blocks into almost a "saw-tooth" pattern.

> If it is a wave it is unlikely to be caused by tracking, more likely by
> an unbalanced wheel, unbalanced hub + disk (now that is bollocks to find
> let alone fix) etc.

An unbalanced wheel would show itself in vibration at speed, a warped 
disk by vibration under braking.