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Our newest S and S Coupling with internal lugs (the ends fit inside the frame tubes). The BTC2 Couplings listed here are our "zero" wall type meaning that they are designed to work with tubes with a wall thickness of .020" minimum to .040 maximum...
Our newest S and S Coupling with internal lugs (the ends fit inside the frame tubes). The BTC2 Couplings listed here are our "zero" wall type meaning that they are designed to work with tubes with a wall thickness of .020" minimum to .040 maximum. The lug portion of the coupling must be machined (turned down) by the frame builder to suit the inside diameter of the tube being used. BTC2 Couplings are suitable for new frames or retrofits.
