Soft collisions

hello, how to add a "soft" collision in other place? I want it to work like it does on a racetrack. The copied tires themselves do not have any collisions and it looks like in the second part of the video

 

I am also wondering about this.
My observations:
Green tires on Hirochi Raceway fdon't have soft collision
White and red ones on PZN Race track do have soft collision and this feature stays when the tires are copied.

 

wow that's interesting, but finally in my project i used a different prop which had a collision without any problem