>Karl Rickert wrote:
> >
> > Normal? You've got to be kidding! No tread seperation is normal. It's a
> > defect if you ask me! If you had the same problem with a set of street
>tires
> > you'd want a replacement right! Well same here!
> >
>
>Cowguy chimes in:
>
><<<There was a note recently on team.net about someone seeing a
>circumferential crack around their Kum-ho. I don't know all the details
>on this, but this past weekend at a Milwaukee SCCA event, a Kum-ho
>apparently came apart along a similar line. Along the inner sidewall if
>I heard correctly, bringing the car to a halt. (safely thankfully)
>Maybe someone who has better information can fill in or correct me.
>Personally, I'm buying American. :)>>>
Paul Foster wrote:
>I wasn't the poster this time but I have had this happen to me a couple
>of times and I reported it a nubmer of months ago. It is due to extreme
>underinflation. Kumhos need at least 6-8 more lbs of air than BFG R1s.
>Once I went from 27 lbs cold to 33 lbs cold the problem disappeared.
>THIS IS VERY DANGEROUS!
I run my tire pressures almost 10-12 lbs hign than what I do in my R-1's,
so I can't believe it's from underflation.
>I am still a bit perturbed by the delamination but it hasn't happened to
>me recently and I don't think it is near as serious as sidewall cracks.
>It may have something to do with running full tread versus not, or
>running the tire in the opposite direction it was originally intended.
>(Here we go again!)
I've never seen the sidewall crack thingie, but I'd think it might be due to
turning them around on the rim.
Karl Rickert
CS #38 Alfa Romeo Spider
TLS #25
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