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Old 06-23-21, 08:50 PM
  #14  
Doc_Wui
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Join Date: Jul 2015
Location: Chicago Suburbs
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Bikes: GT Transeo & a half dozen ebike conversions.

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My $8 Harbor Freight floor pump did that after six years. Rubber seal. I put some silicone spray in there. If it eats the rubber, I get a new pump,
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