An individual time trial (ITT) is a race in which cyclsts race alone against the clock. ITT's are also referred to as "the race of truth", as winning depends only on each rider's strength, endurance and determination against the clock.
Starting times are at equal intervals, usually one or two minutes apart. Starting later gives the racer the advantage of knowing what time they need to beat (and also makes the event more interesting to spectators). Competitors are not permitted to draft behind each other. Any help between riders is forbidden. The rider with the fastest time is declared the winner.
Specialized aerodynamic bikes, clothing, helmets, aerobars and other equipment are often used in ITT events. Generally, components are designed to be as aerodynamic as possible, as most of the rider's effort goes into overcoming aerodynamic drag. The rider's position makes the greatest difference, and most use the now-standard tuck position, using tribars to allow the rider to position their arms inline with the wind and allow their back to sit as low and flat as possible, reducing frontal area and improving air flow around the body. TT bikes often have lower handlebars than normal road racing bikes to facilitate this. Also, the saddle is sometimes moved forwards relative to the handlebars and bottom bracket to allow the hips a more natural angle of motion, improving performance.
The Chicago Time Trial series is a joint effort between several clubs, sponsors and TT enthusiasts to assemble a season-long competition to determin just who is the fastest on two wheels. The courses range from windy straight slogs, to rolling and technical- all designed to keep the rider on their toes. Information about the series, the courses and more can be fount at the official CTTS website: ChicagoTT.com