Bicycle Torque Coupling System™

Many thanks for reply. S and S Machine only makes S and S Couplings, they don't makes frames that's odd. As I see the main popularity is out of EU and BTCs is usable for tandem, recumbent. Found only one manufacturer in EU worth visiting (Trorn Cycles )... W.T.F.? Which century the webpages where made? Absolute amateur work and links to frame manufactures: I wouldn't recommend it to nobody. But still, I'v got usual information. Don't know who to contact.

Yes, that it! And I know the store! I often buy stuff there. Many thanks for info.