I pontificated:
> >Punctures are
>> never the fault of the tire, unless it is a tire that has worn so
> > thin that a tiny sliver of glass can fit through it.
Bob Atwood wrote:
>In theory I would tend to agree with Sheldon's statement above. However
>on Tuesday I came up over a bit of a rise to discover a stretch of bike
>lane littered with multiple broken beer bottles -- there was a lot of
>jagged glass on the road and no way to avoid it. Too late to stop ...
>crunch .... crunch ... crunch!
>
>The Vitoria Team Pro (with well over 500 "city" miles on it) on the front
>came through like a champ. The brand new "heavily armored" Armadillo
>something or other that I had just bought at the LBS on Monday was sliced
>up like a piece of baloney right through the tread and belt into the
>inner tube. Both tires were at proper pressure.
>
>I guess all this proves nothing -- but I don't think I will buy any more
>heavily armored Armadillo whatevers.
I don't sell Specialized tires any more, but this was probably not due to any deficiency in the tire.
Sharp pointy things lying in the road normally lie flat, so when the front tire rolls over them, it goes over the flat side. After the front has rolled over, the foreign object often bounces up spinning...just in time to get hit by the rear tire while it is a more threatening orientation. This is generally considered to be the reason that rear punctures are so much more common than front ones.
Sheldon "On The Bounce" Brown
Newtonville, Massachusetts
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