Old 05-18-09, 08:56 AM
  #54  
MrCjolsen
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Bikes: Surly Cross-Check, '85 Giant road bike (unrecogizable fixed-gear conversion

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How slow is the leak? Tubes lose air no matter what. Rubber is actually porous. A good tube will drop from 120psi to 100 over the course of a weekend. Sometimes the valve seal isn't perfect.
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