Free racing games?

[Virtual01]

Want to test out a racing game on my rig without spending money. Are there any decent free ones floating around? I don't really care what kind of racing, it can be weird or realistic.

 

I already played Sanic Ball and Trackmania doesn't seem to want to work with my GPU.

[PlayStation 2]

iRacing?

[LogicalDrm]

iRacing is 30day free trial. Live for Speed has demo with 1 track and 2 cars, but its pretty old. Some Dirt games have had demos. Like Dirt Showdown.