Handlebar types refer to the various designs of bicycle handlebars that affect rider comfort and control. Common types include drop bars, which are curved and allow for multiple hand positions, making them popular for road bikes. Flat bars provide a more upright riding position, often found on mountain bikes, offering better visibility and control. Another type is the bullhorn bar, which features a forward extension, ideal for aggressive riding styles. Riser bars elevate the grips, enhancing comfort and maneuverability, especially in off-road conditions. Each handlebar type caters to different riding preferences and styles, influencing overall bike performance.