Systems, methods, and apparatuses regarding an improved sheet product dispenser are provided herein. Example sheet product dispensers include a rotatable carriage that holds two full size product rolls. Upon substantial depletion of one of the product rolls, the sheet product dispenser is configured to enable the carriage to rotate to present the depleted product roll to the janitor for easy and intuitive replacement. For example, a carriage with a depleted product roll may be configured to automatically rotate upon opening of the cover. Additional features for intuitive and reliable installation of the product roll are also provided herein, such as roll holder slot guides and a retention mechanism that maintains installation of a product roll during rotation of the carriage. Such example sheet product dispensers help to eliminate product waste, reduce confusion while loading, and reduce the time and effort required to load the sheet product dispenser.