Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Mentioned: 9 Post(s)
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I think that what you're seeing is the casing through the wall. Casings have 2 bias plies running at 45° as you see on the side. But tires aren't woven rather each ply consists of strands all running in the same direction and held with glue. These are very delicate, and can come apart when handled, so they weave a cross thread at intervals (not on tubulars) to hold the ply intact during the tire molding process. That cross woven thread is what you're seeing, as the gum cover breaks down with age.
In any case, worn tires don't cause flats, except as the tread layer gets thinner and easier to cut. Flats depend on how much and where you ride. I commute through some rough areas so glass cuts are common. I've gone a year between flats and had three in a month, it's purely random.
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