difference between road bike and time trial bike
Time trial bicycle Since the cyclist in a time trial is not permitted to draft[1] (ride in the slipstream) behind other cyclists, reducing aerodynamic drag of the bicycle and rider is critical. One difference between a time trial bicycle and a road bicycle is the use of triathlon handlebars or aerobars. The main part of the bullhorns curves forward (like a road handlebar), but where the road handle bar curves down, the time trial bar ends. This provides a low tucked position that is aerodynamic while providing good stability. The time trial bar also uses a "clip on" bar or aerobar which attaches to the main bar near the stem and provides a position where the hands and fore-arms are close together, low and forward, providing a very aerodynamic (though less stable) position. The aerobar became popular when Greg LeMond made up 50 seconds to defeat Laurent Fignon (the race leader) in the final stage (and final time trial) of the 1989 Tour de France. Time trial races tend to be much shorter than road races, so comfort is less of an issue. Also, control of the bike is less important, since there is little chance of bumping another rider and the courses tend to be less technical with little hill climbing, turns or descents.