Old 08-13-09, 07:35 PM
  #2  
grinningfool
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Location: Somewhere between Bangor and Augusta
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Bikes: 2014 Surly LHT, 2003 Giant NRS 3, 1991 Trek 700, 2006 Cannondale Six 13 Team, 1985 Miyata 210

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Put a piece of tape on the floor, and align your valve stem with it. Then roll your bike one wheel revolution, and put another piece of tape on the floor aligned with the stem again. Then measure the distance from one piece of tape to the other. That is your wheel circumfrence.
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