It just makes sense to me that if the rubber has to stretch too much
it is under tension and it gets thinner so it's easier to puncture it.
I have some 700x47's and tubes for 35mm tires that don't seem to hold
air as long yet the same size tube using a 32mm tire seems to hold air
much longer. I don't know it it has any bearing but I have experienced
this on my single speed bike too with 'narrow' tires and wider than
for the tire, tubes. Then again, I've only had two or three flats and
one blowout in the last 12,000 miles so maybe I don't ride enough. It
just seems logical, if you have a choice, to use the most ideal
combination for something as important as tires.

On Mar 1, 10:27 am, PATRICK MOORE <bertin...@gmail.com> wrote:
> On Sat, Feb 28, 2009 at 11:33 PM, charlie <charles_v...@hotmail.com> wrote:
>
> > In my mind, the more a tube has to stretch the greater the chance of a
> > puncture. I try to use the largest volume tube of the correct diameter
> > for the tire. In a pinch, whatever works is better than walking for
> > ten hours.
>
> At what point (that is, inverse ratio of tube size to tire size) has this
> been born out in your experience? In mine, again, a 1" tube in a 38 mm tire
> punctures no more than a 28 mm tube in a 28 mm tire.
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