Thread: Convert EF Schwinn to French Thread BB
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Old 01-24-12, 12:42 PM
  #15  
Scooper
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Location: Santa Rosa, California
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Bikes: Waterford 953 RS-22, several Paramounts

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The Sports Tourer has standard 68mm 1.37" x 24TPI English thread BB shell.

The Ashtabula to 3-piece crank adapter sailorbenjamin mentions isn't necessary for a Sports Tourer, but is necessary for the Super Sport which came with a one-piece Ashtabula crank like the EF Sprint (the BB shell on Super Sports is larger than the shell on the Sports Tourer and isn't threaded).

Here's the TruVative BB adapter that converts bikes with Ashtabula BB shells to be compatible with English threaded bottom brackets.



Here's the TruVative adapter installed on my '73 Super Sport.

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Last edited by Scooper; 01-24-12 at 03:35 PM. Reason: added photos
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