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Old 03-15-10 | 11:40 AM
  #7  
Leebo
Senior Member
 
Joined: Aug 2009
Posts: 5,720
Likes: 111
From: North of Boston

Bikes: Kona Dawg, Surly 1x1, Karate Monkey, Rockhopper, Crosscheck , Burley Runabout,

The pinch flat is caused by low tire pressure. The tube is pinched against the rim, it looks like a snakebite, usually with 2 parallel punctures the width of the rim. Most often happens on my mountain bike.
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