This is an old muse from the collection. Takhion was special make of sport bicycle from Kharkov, Ukraine, in former-USSR. Named tachyon: (in Physics) a hypothetical subatomic particle that always travels faster than speed of light. Developed by Central Design & Technology Agency, Bike Building, or CDTA BB, from 1981 to 1992, nearly 400 custom bicycles were produced, over a dozen models for road, track and time trial competitions, featuring original-patent aluminum, carbon and titanium components.