: Available for free on Steam under the "Tools" category.

If you are using the standard version (often found on Steam), the process is automated:

: Trucks require both a .X mesh file (the 3D model) and a corresponding .XML file that defines its physical properties like weight, torque, and fuel capacity.

Getting Spintires up and running—especially with the massive library of community mods—can feel like navigating a swamp, but it’s straightforward once you know the file structure. 1. Base Game Installation

For those looking to create or deeply customize their experience, the Spintires: MudRunner Modding Guide provides a technical roadmap:

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