SwissBike's full-size, high-performance bikes fold in half for easy storage or transport using a technology originally developed to allow military paratroopers to airdrop with a mountain bike. There are three models of SwissBike. The SwissBike XO is the flagship model, sporting the Sram XO drive train and Montague's CLIX wheel retention system. For those who like the folding feature but are on a budget, the LX (pictured) and the TX offer the same folding feature with Shimano's 24-speed and 21-speed drive trains and Montague's CLIX wheel retention system.