Re: [GMCnet] Tires on Sale [message #91984] |
Wed, 14 July 2010 18:46 |
Gary Casey
Messages: 448 Registered: September 2009
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I certainly agree with Gene's comments. But the comment of essentially "tires
are cheap, blowouts are expensive, so replace them often" makes sense only if
replacing tires on age actually improves the odds. Statistical data, if there
is enough to be significant, should back up the idea of replacing tires on age.
Looking at the average and standard deviation of the ages of tires in service
compared to the tires blown should tell something. What would happen, for
instance, if the age of blown tires is LESS than the average age of tires still
in service? It might say that newer tires are less robust than older tires
(??), or it might mean that there is a infant mortality problem and frequent
replacement actually increases one's chances of a failure. I don't know where
the data will lead.
Yeah, I know - too much time on my hands :-)
Gary
might be interesting ( because you can)
however
what will you do with the data?
you cannot control the rubber formulation (changes every year, with every
manufacturer)
you cannot afford the risk of a blowout (just to push the envelope)
the cost of this risk is $2K plus
all to save $100 for a new tire? (less than the cost of dinner for 2 ;>)
I am a big proponent of (do it because you can)
but I am a belt and suspender guy (no risk if no need)
have fun
gene
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Re: [GMCnet] Tires on Sale [message #91985 is a reply to message #91984] |
Wed, 14 July 2010 18:55 |
jw mills
Messages: 199 Registered: September 2006
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This sounds like a real Six Sigma project - just don't ask me to do it.
On Wed, 2010-07-14 at 16:46 -0700, Gary Casey wrote:
> I certainly agree with Gene's comments. But the comment of essentially "tires
> are cheap, blowouts are expensive, so replace them often" makes sense only if
> replacing tires on age actually improves the odds. Statistical data, if there
> is enough to be significant, should back up the idea of replacing tires on age.
> Looking at the average and standard deviation of the ages of tires in service
> compared to the tires blown should tell something. What would happen, for
> instance, if the age of blown tires is LESS than the average age of tires still
> in service? It might say that newer tires are less robust than older tires
> (??), or it might mean that there is a infant mortality problem and frequent
> replacement actually increases one's chances of a failure. I don't know where
> the data will lead.
> Yeah, I know - too much time on my hands :-)
> Gary
>
>
> might be interesting ( because you can)
> however
> what will you do with the data?
>
> you cannot control the rubber formulation (changes every year, with every
> manufacturer)
>
> you cannot afford the risk of a blowout (just to push the envelope)
>
> the cost of this risk is $2K plus
>
> all to save $100 for a new tire? (less than the cost of dinner for 2 ;>)
>
> I am a big proponent of (do it because you can)
> but I am a belt and suspender guy (no risk if no need)
>
> have fun
> gene
>
>
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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Re: [GMCnet] Tires on Sale [message #91999 is a reply to message #91984] |
Wed, 14 July 2010 21:31 |
Bob de Kruyff
Messages: 4260 Registered: January 2004 Location: Chandler, AZ
Karma: 1
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""I certainly agree with Gene's comments. But the comment of essentially "tires
are cheap, blowouts are expensive, so replace them often" makes sense only if
replacing tires on age actually improves the odds. Statistical data, if there
is enough to be significant, should back up the idea of replacing tires on age.
Looking at the average and standard deviation of the ages of tires in service
compared to the tires blown should tell something. What would happen, for ""
Well I agree with that. As I mentioned in an earlier post, I have had friends experience blowouts well within the 5 to 10 year period. On the otherhand, I nursed mine well into questionable 12 year area,.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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