G
Gary Young
Guest
jim beam <[email protected]> wrote in message news:<[email protected]>...
> David L. Johnson wrote:
> > On Thu, 15 Jul 2004 00:27:17 -0700, John McGraw wrote:
> >
> >
> >>Why them ain't no cracks on the Rolf wheels. Rims can only crack when
> >>they are hard anodized. You do not have to belive me. Just Google this
> >>groups archives on the subject & Jobsts posts in particular ;-). In
> >>reality I am far from convinced that all hard anodizing causes cracks
> >>& that non anodized rims almost never crack, which is what Jobst has
> >>implied for years, sometimes going so far to state that any anodizing
> >>causes rims to crack. John
> >
> >
> > In fairness to Jobst, who seems to be off somewhere right now (or at
> > least off on a different thread), saying that hard anodizing causes
> > cracks is not the same as saying that a non-anodized rim will not crack.
> > It is certainly true that non-anodized rims can crack, but that takes
> > nothing away from his observation that anodized rims are more likely to do
> > so.
> >
>
> unfortunately, that "observation" is flawed. i've examined a number of
> cracked anodized rims, and while it is possible for cracked anodizing to
> initiate fatigue, it's not been the cause of any of the cracking i've
> seen. jobst may have ranted on about it for years but it does not mean
> he knew what he was looking at or that he'd done his "analysis" correctly.
>
> fact: anodizing is present on the majority of the rims frequently cited
> here as "unanodized".
> fact: anodizing protects against more serious flaws that cause premature
> failure like pitting & corrosion. that's why it's done.
And your qualifications to be making these observations are?
> David L. Johnson wrote:
> > On Thu, 15 Jul 2004 00:27:17 -0700, John McGraw wrote:
> >
> >
> >>Why them ain't no cracks on the Rolf wheels. Rims can only crack when
> >>they are hard anodized. You do not have to belive me. Just Google this
> >>groups archives on the subject & Jobsts posts in particular ;-). In
> >>reality I am far from convinced that all hard anodizing causes cracks
> >>& that non anodized rims almost never crack, which is what Jobst has
> >>implied for years, sometimes going so far to state that any anodizing
> >>causes rims to crack. John
> >
> >
> > In fairness to Jobst, who seems to be off somewhere right now (or at
> > least off on a different thread), saying that hard anodizing causes
> > cracks is not the same as saying that a non-anodized rim will not crack.
> > It is certainly true that non-anodized rims can crack, but that takes
> > nothing away from his observation that anodized rims are more likely to do
> > so.
> >
>
> unfortunately, that "observation" is flawed. i've examined a number of
> cracked anodized rims, and while it is possible for cracked anodizing to
> initiate fatigue, it's not been the cause of any of the cracking i've
> seen. jobst may have ranted on about it for years but it does not mean
> he knew what he was looking at or that he'd done his "analysis" correctly.
>
> fact: anodizing is present on the majority of the rims frequently cited
> here as "unanodized".
> fact: anodizing protects against more serious flaws that cause premature
> failure like pitting & corrosion. that's why it's done.
And your qualifications to be making these observations are?
