Time trial / Triathlon bars or aerobars include various styles of aerodynamic handlebars extensions for road racing bikes particularly time trial and triathlon bikes. They are narrow, bolt-on extensions that draw the body forward into a tucked position, they are designed to drop the torso into a slightly lower position and narrow your frontal profile, some bars are integrated units that combine the handlebars and tri bars in one unit. Tri bars are commonly used in triathlons and time trials events, both on the road and track. However, they are illegal in most mass start road races or off road events.
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