HTire uses exactly the same program interfaces as all other members of the FTire Tire Model Family. If called by the Cosine Tire Interface (CTI), the member of the FTire Tire Model Family to be used is determined on the basis of the contents of the tire data file. If HTire is recognized, the Magic Formula variant to be used is determined in a similar way, and the content of the data file is interpreted respectively. The data file is downward compatible to data files of several other Magic Formula implementations.

As with all other members of the FTire Tire Model Family, two data file formats are available:

In this documentation, only the TeimOrbit format is described for the tire property file.