Takhion was a 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.”
“Takhion bicycles were originally designed for the USSR National Team,
which used Campagnolo, Colnago, DeRosa, Rossin, Cinelli (from Italy) and RIH (Netherlands).
A CDTA BB technical symposium in mid-1980s included experts from Columbus, Bianchi, 3T, Alpina (Italy).
Takhion then supplied cycling teams of Republics Belarus, Estonia, Latvia, Lithuania, Ukraine and Kirghizia.
Several USSR National Championships, and at least one World Championship, have been won on Takhion.”
text from bikecult.com.