A tri bike is designed to be more aerodynamic than a road bike, which can make it faster in certain conditions. The frame geometry of a tri bike also places the rider in an aerodynamic position that reduces drag and increases speed. Additionally, the wheels on a tri bike are typically deeper than those on a road bike, allowing for greater efficiency when riding at higher speeds. In general, riders will experience faster times with a tri bike compared to a road bike due to its design features and components.