Oct 17, 2011
S&S Bicycle Torque Couplings
I just learned about these couplings made by S&S Machine:
Frame builders can use these on new or existing frame to permit them to be taken apart.
They are installed in-line with the top tube and the down tube to form a quick release so you can make your frame collapsible. In the S&S Machine's words:
"A bicycle manufactured with this system is ultra strong yet lightweight (two BTCs™ add only 8 oz. total to a typical road bike) and it feels exactly the same as a bicycle built without BTCs™. There is no added frame flex and the BTC™ is absolutely silent!"