You are downloading hundreds of tracks for free. Remember that real people spent hundreds of hours making them. When you enjoy a great :

For rFactor 2 users, this is the most convenient option. Studio 397 and independent modders frequently upload high-quality free content here.

A community-led effort to compile and host links to hundreds of rFactor tracks, ensuring older content remains accessible.

Some tracks require (trees, skidmarks, common textures). Those come as a separate download – install into rFactor\GameData\Shared\ accordingly.