Atime trial bicycle is aracing bicycle designed for use in anindividual race against the clock. Compared to a road bike, a time trial bike is moreaerodynamic, has a shorter wheelbase, and puts the rider closer to the front of the bicycle. It may have either a solid disc or spoked wheels.^[1]

Since thecyclist in atime trial is not permitted todraft (ride in theslipstream) behind other cyclists, reducing thedrag of the bicycle and rider is critical.^[2]

Time trial bicycles are similar to triathlon bicycles. Triathlon bicycles have a steeper seat tube angle, which pushes the hips forward and saves the hamstrings for the run. TT bicycles have to followInternational Cycling Union (UCI) rules. UCI requires that the saddle nose of the TT bicycle must be 5 cm from the centre of the bottom bracket.^[3]

• Outline of cycling
• Time trialist

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