Old 05-21-13, 11:28 PM
  #20  
CrankAndYank
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Join Date: Mar 2013
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Bikes: 2 x 2012 GT Series 1, 2012 P2C

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Put the bike in a trainer, get someone on it to turn the cranks and use a razor knife to round out the tire (think lathe). They do this to race car tires to customize them for specific tracks/conditions.
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