Tires are a very important part in rF 2 and to build them, is hard to impossible for the most of us.
So i have written some scripts in the past, that allow to resize existing tires, to be able to use
them with cars, that use tires with different sizes.
Many of you already know these scripts and have used them in the past.
I now have overworked them a little bit, to improve the accuracy and also, as i hope, the usability.

I want to give some basic informations here, that can help to avoid problems with resized tires.

It starts with the connection of tbc and tgm files, the human driver and the AI and also the 3D of the tires.
It can be said, that the human driver uses the TGM files and the AI the TBC files.
And the values that these files use, should be set as best as possible, to get the as close as possible
same behaviour and speed of the human driver and the AI.

The main values, that these tools modify, are the radius and the width.
The best basic result you can get is, if these sizes match each other in the TGM, the TBC and the 3D Model of the tire.
In the TBC file, you have the entries Radius=, Width= and the first Value of Rim= for each tire and the TGM have the Nodes.

When you use these tools, you eventually will see some differences in the appearance of the tires,
when you are in the DevMode and switch between old (tbc) and new (tgm) tire model, with Alt+T.
If that is the case, you have to carefully adapt these values, until there is no noticable change anymore,
when you switch between old and new tire model.
And the human driver and the AI should reach the same maximum speed, with the identical setup, of course.

Tool selection
You can use different tools, that work in a different way.

The first one is the oldest one.
With this tool, the position of the nodes from a TGM file gets modified
and you can see the old and new shape being displayed in a graph.
In that way the tire can be resized in the diameter and the width and also in the height.
If you use this tool, please check the modified tire, if it behaves in a normal way.
The reason is, that a tire, where the position of the nodes has changed, should run the ttool again,
to calculate it's behaviour again and store these information in the file.
But since i never have received a complaint about a strange behaviour of a tire that has been
resized with this Tool, it don't seems to be necessary, to run it in the ttool.
To use this tool, click this button: (10153 x used)

The next tool can be used, to upload one or more TGM files, to resize them by using the SizeMultiplier.
You also can use this tool, to quickly check the size of one or more TGM files, where the size is unknown.
To use this tool, click this button: (3111 x used)

The last tool can be used, to convert a rFactor1 TBC file to rFactor2 format or to upload a rFactor2 TBC file,
where the tires shall be changed.
Important: In both cases, ensure that the Radius= and Width= and the first value
of Rim=, for each compound in the TBC are the proper ones, because the TGM files that you add for the TBC file,
get resized by using these values.
This tool uses the SizeMultiplier, that is in the TGM file, to resize the tire.
To use this tool, click this button: (1972 x used)