They are in our test version and that will be released with the VW Scirocco and new physics.
Thank you, this is the key to the problem. If anyone joins with R4 tyres, all Z16 racers are kicked. Thanks to your report, I have found the bug in the code and will release the fix as soon as possible. Maybe this evening but probably Sunday morning.
Your patch installation did not work correctly. There is a file lfs.abc in your data\abc folder and that should be the new one with file date 8 September 2009.