Traveling with your beloved full-size bike is an exercise in frustration. First, spend up to an hour packing your bike into a US $450 bike case. Then pay up to US $150 (each way) to the airline company. When you arrive at your destination, discover that your expensive bike case won't fit into most taxis and can't be easily brought aboard buses or trains. Not fun. The alternative is to ride a rental bike, or worse yet, to not ride at all. Enter InterLock Joint Technology from Dahon. The patented new InterLock joint allows us to design full size bikes that look and ride exactly like a conventional bike, but which pack in ten minutes into an airline legal suitcase for easy transport. Never leave home without your bike again. Dahon patented technology.