Quote from Flame CZE :

First you need to allow slick tyres on the car. This can be done in the vehicle editor Allow tab.

Thanks a lot mate, this is exactly what I was looking for

Hello,
First of all, I would like to apologize for my poor English. I am from Poland. I have an S3 license and I use the Vehicle Editor add-on. I would like to be able to change the type of tires in cars. For example, to install slick tires on XFG. Is it possible?
Thanks, Dawid.