So according to the ingame graphic it said it will run until the 30th, but this news post states its running over the weekend.
Either way all paid content ingame is free for all to try out. for the next few days atleast.
Additionally as always. If you do like the content and intend on purchasing from the store. You can get everything 30% cheaper by buying VRP currency directly from Racerooms web store rather than through steam. Be careful too as the purchase will be through USD or Euro, depending on which currency you selected at checkout.
I'd love to see more Raceroom popularity in Aus. I'm sick of wasting money on iRacing for multiplayer, or suffering terrible racing in ACC public lobbies