The American Truck Simulator (ATS) 1.39 update , released in November 2020, introduced major structural and content improvements, including a redesigned launchpad and ownable lowboy trailers. To access this specific older version on Steam—often necessary for mod compatibility—you must manually downgrade your game through the platform's beta settings. How to Download ATS 1.39
Ownable Lowboy Trailers: These trailers were completely redesigned from the ground up. Drivers can now purchase, customize, and use them for heavy-duty jobs across various DLCs, including Special Transport and Forest Machinery. american truck simulator 1.39 download
Mod Compatibility: Some older map mods or high-detail truck mods (like those by Jon Ruda) were specifically optimized for the 1.39 sound engine and may not work on newer versions. The American Truck Simulator (ATS) 1