General Tires

[Monke_Gaming]

Is there a way i can use the games .lut files to make a cars tires wider? i know simple things like changing the engine configs but i cant figure out the tires files, anyone know how? whenever i change the files for a car ( say a semislicks-rear.lut file ) the changes save, but nothing actually changes in game. does this only apply to visuals or something? is it to do with physics files at all?

any help appreciated!!!