When it comes to transporting cargo on top of your vehicle, you have a choice between roof racks and rails. While they may seem similar at first glance, they actually have different features and benefits. Roof racks are a system that attaches to the roof of a vehicle, typically using a set of crossbars and feet, and allow for the transport of cargo on top of the vehicle. Rails, on the other hand, are a type of roof rack that attach to the roof of a vehicle using a set of side rails and crossbars. Understanding the difference between roof racks and rails will help you make the best decision for your needs.