This is a 3d printable extra pack of the Ferrari 250 GTO. It contains 4 extra tires (Avon CR66 ZZ) that can replace the Dunlop CR65 tires that come with the Base Kit. They fit the same Borrani rims included in the Base Kit.
You need to buy the 3d printable base kit for the 250 GTO before buying the extra pack.
There are 4 interlocking parts in SolidWorks assembly, STL, 3MF, F3D, OBJ and STEP files. You can print them separated or you can choose to merge multiple parts from this and the base kit and print together. All 4 parts replace original base kit parts. Also included are SVG files with bumpmaps for the tire sidewalls if you want to use them for displacement (3D texture).
Use 7-Zip to extract the archives if you have issues with them.
You are allowed to sell the 3d printed parts or the whole kit after printing, but you are not allowed to share or sell the digital 3d model.