There are two Swift Folder frames, one is low-volume Chromoly manufacturing by Human Powered Machines of Eugene, Oregon, which also makes work bikes and trailers; the other, manufactured in Taiwan from TIG welded aluminium alloy with a "chromoly" steel fork, was marketed by Xootr. The frame is generally built to common "industry-standard" sizes and threads, and can accommodate a wide variety of gear systems, brakes and other components. The rear fork spacing can accommodate most standard road and mountain bike wheel-hubs.