Bike Forums - View Single Post - Bikes with wheelchair wheels on them
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Old 08-19-18, 11:53 AM
  #12  
jeffreythree
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Join Date: Jul 2016
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Bikes: '90 Schwinn Traveler(retired), '61 Bottecchia, '86 RS Maxima, '17 Jamis Renegade Exile, '92 Trek 920

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My wife is in a wheelchair, and I am in charge of its maintenance. Wheelchair wheels mostly have 540 mm rim diameters, 44 mm smaller than 650B. I also don't understand the need to drill for a valve stem since they are almost all pneumatic tires. The hubs use a push button through axle system with no provision for mounting any kind of hub or fixed gear. I am not sure how or why one would want to even try the conversion.
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