In recent years, a new trend has emerged in the cycling world: the gravel bike. This versatile and innovative bicycle design combines elements of both road bikes and mountain bikes to create a unique riding experience. Here we will explore the key differences between a gravel bike and a road bicycle, focusing on characteristics such as brake type, frame stiffness, tire width, and the intended terrains for gravel bikes. Additionally, we will discuss the overall appearance of gravel bicycles, highlighting their distinctive features.