Old 08-19-19, 11:53 AM
  #24  
Chinghis
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Join Date: Jul 2013
Location: Southern California
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Bikes: Historical: Schwinn Speedster; Schwinn Collegiate; 1981 Ross Gran Tour; 1981 Dawes Atlantis. Current: 1992 Specialized Stumpjumper FS

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Originally Posted by indyfabz View Post
They are called S&S Couplings. You can get some bikes built with them, or you can have them added later.

Folding Travel Bikes using S and S Machine Bicycle Torque Couplings™
Very interesting, thanks.

And thanks to the OP for the name clarification, too!
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