If you do get S & S couplers, make sure you get a new paint job. I just spray painted the one inch area, and eventually water got in the tube and siezed the bottom bracket. Bilenky said the frame was unsafe and trashed it. I would not do it again. The case, the couplings and the paint job cost a lot of money. I had to pay $75 to fly with Delta. They charge if it is a bicycle, not by size. I did get my money worth before the steel frame rusted, but I would get a Bike Friday next time. I am retired so I drive to cycling events. I have not crossed the big pond with a bicycle.