Board Thread:Game Discussion/@comment-34609328-20180422153648/@comment-28169398-20180422233804

It is technically 3 tires off track that triggers off track. You can see this if you skid off on a sweeping curve. The front-inside tire will still be on track, but the others are off and it will trigger the off track.

It is a little less clear when you are going over a curb. Some places, like on Mulsanne, you can be completely outside of the curb and still be considered on track. In others, two tires may still be in contact with the curb, but you get flagged for being off track.

A practice mode that has all of these things would be a welcome feature, but after 5 years, I don't know if we should be holding our breaths.