C
Carl Fogel
Guest
Mike Latondresse <mikelat@no_spamshaw.ca> wrote in message news:<[email protected]>...
> [email protected] (Carl Fogel) wrote in news:[email protected]:
>
> > dvt <[email protected]> wrote in message news:<[email protected]>...
> >> Benjamin Weiner wrote:
> >> > The fact, which many of us have noticed, that high chain tension often occurs at a particular
> >> > crank position points to the chainring (or less likely, the crank) as a source of error.
> >>
> >> Carl, read this previous paragraph carefully. Benjamin is not the first person to posit this
> >> theory, but he says it quite clearly.
> >>
> >> Dave dvt at psu dot edu
> >
> > Dear Dave,
> >
> > Sounds as if the chainring would then be out of round in a significantly measurable way,
> > doesn't it?
> >
> > Of course, others have been saying that it's a trickier combination of two significantly
> > out-of-round sprockets, front and rear, which occasionally reach their worst positions at
> > the same time.
> >
> > But that also sounds as if they should be measurable, too.
> >
> > It's an interesting situation, with so many people insisting that there's a clearly observable
> > phenomenon (varying chain tension) that either cannot or should not be measured at what's
> > supposed to be the source (gear teeth running out of true).
> >
> > Carl Fogel
> >
> Carl, haven't you dragged this dead end discussion along enough. Many of us who ride fixies have
> watched the chain tension alter and most of us who have read Sheldon's stuff have used his
> suggestions to adjust tension so that it is a non-issue. Please do not give me one of your long
> explanations, just give it up.
Dear Mike,
Short explanation. I measured 18-inch sections of the same worn chain. They varied about 1.7mm. So I
think that the chain is likely involved.
Carl Fogel
> [email protected] (Carl Fogel) wrote in news:[email protected]:
>
> > dvt <[email protected]> wrote in message news:<[email protected]>...
> >> Benjamin Weiner wrote:
> >> > The fact, which many of us have noticed, that high chain tension often occurs at a particular
> >> > crank position points to the chainring (or less likely, the crank) as a source of error.
> >>
> >> Carl, read this previous paragraph carefully. Benjamin is not the first person to posit this
> >> theory, but he says it quite clearly.
> >>
> >> Dave dvt at psu dot edu
> >
> > Dear Dave,
> >
> > Sounds as if the chainring would then be out of round in a significantly measurable way,
> > doesn't it?
> >
> > Of course, others have been saying that it's a trickier combination of two significantly
> > out-of-round sprockets, front and rear, which occasionally reach their worst positions at
> > the same time.
> >
> > But that also sounds as if they should be measurable, too.
> >
> > It's an interesting situation, with so many people insisting that there's a clearly observable
> > phenomenon (varying chain tension) that either cannot or should not be measured at what's
> > supposed to be the source (gear teeth running out of true).
> >
> > Carl Fogel
> >
> Carl, haven't you dragged this dead end discussion along enough. Many of us who ride fixies have
> watched the chain tension alter and most of us who have read Sheldon's stuff have used his
> suggestions to adjust tension so that it is a non-issue. Please do not give me one of your long
> explanations, just give it up.
Dear Mike,
Short explanation. I measured 18-inch sections of the same worn chain. They varied about 1.7mm. So I
think that the chain is likely involved.
Carl Fogel