[ExI] 26 inch tube

[david]

On Thu, 23 Oct 2014 16:34:13 -0500
William Flynn Wallace <foozler83 at gmail.com> wrote:

> If there is a fold or crimp, as there must be, then you might have
> difficulty getting the whole thing inflated as air might not get by the
> crimp well.  bill w
> 
> On Thu, Oct 23, 2014 at 3:05 PM, Kelly Anderson <kellycoinguy at gmail.com>
> wrote:
> 
> > It would work temporarily, if you could get it inside the tire and
> > inflated, but over the long term there would be extra stress at the fold,
> > and you could possibly get a new leak.
> >
> > -Kelly
> >
> > On Thu, Oct 23, 2014 at 11:11 AM, spike <spike66 at att.net> wrote:
> >
> >> Hey here’s a fun one for you.  I ride a recumbent bicycle nearly every
> >> day, not to get somewhere in particular but just to ride and exercise.  If
> >> I get a thorn puncture, I carry a spare tube rather than patches.  Patches
> >> work but tubes aren’t expensive, and it is typically over a thousand miles
> >> between flats.  It is always the back tire on a recumbent, since all my
> >> weight is over the back tire.
> >>
> >>
> >>
> >> Yesterday I had a flat close to home, longer than I wanted to walk, so I
> >> got out the spare tube only to discover that they had packaged a 26 inch
> >> tube in a box labelled 20 inch, so of course the tube didn’t fit.  I walked
> >> the bike home mumbling and cursing a pox on Walmart for mislabeling the
> >> tube.
> >>
> >>
> >>
> >> Then it occurred to me: that longer tube might have worked anyway.  It
> >> would have a section which folded back on itself, which would make the tire
> >> unbalanced, but for low speeds such as on a typical recumbent, that
> >> wouldn’t matter much.
> >>
> >>
> >>
> >> Question: can anyone think of a reason why a longer inner tube wouldn’t
> >> work?
> >>
> >>
> >>
> >> spike
> >>
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> >>
> >
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I am pretty sure enough air would leak past a fold to inflate that section,
especially as it can come at the fold from both sides.

If you could arrange it so that there were two half size folds at pi radians
then it wouldn't even be that unbalanced.

-Dsvid