I bought a couple of Vilano APEX 6-speed folders a couple of years ago with plans to take them to Europe. My daughter declared that she didn't want to ride on a folding bike, so we rented bikes in Europe instead. But I was able to fit the bike inside a suitcase with exterior dimensions of 29x20x12. There was a little bulge on the front side that worried me, though. So I just just bought a slightly oversized suitcase with exterior dimensions of 31.5" x 22" x 13.5". The suitcase is five inches over the maximum linear size, but I've read that it is very rare to run into problems so long as the suitcase isn't overweight. And if I do I will pay the fee.

It's really annoying to me that this super-cheap folder ($143) will fit into a suitcase with no work whatsoever while other more expensive folders require the removal of wheels, etc.