A triathlon bike is a specialized bicycle designed for the sport of triathlon, which combines swimming, cycling, and running. These bikes are built for speed and efficiency, featuring a lightweight frame and aerodynamic design. They often have a unique geometry that allows riders to maintain a more aggressive position, reducing wind resistance during the cycling segment. Triathlon bikes typically come with aero handlebars, which help improve aerodynamics and comfort. They also have gearing systems optimized for flat courses, allowing for faster acceleration. Many models include integrated storage for nutrition and hydration, catering to the specific needs of triathletes during races.