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Old 02-26-09, 03:58 PM
  #8  
cachehiker
Soma Lover
 
Join Date: Dec 2004
Location: Logan, UT
Posts: 765

Bikes: one bike for every day of the week

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The tread on my Michelin Transworld City's used to pick up, hold on to, and throw tiny pebbles and bits of glass but I only ever got one flat and that was from a tiny bit of wire from a steel belt. I currently ascribe to the theory that it was because I usually ran them around 60 psi and the additional flexing of the tread pattern allowed the tire to drop whatever it had picked up before it could work its way through the casing and cause a flat. Maybe if I'd run them really hard the bits of glass would've stayed stuck in the tread long enough to work themselves through it.
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