Hi, I´m Victor Ponce, I download the bikes, but then nothing appears in the game.
Username: Victorino487
Sounds like there were no tires in the download. Install this and try again: (because you do have the full version right? Mods don't work with the demo)
Tires Database (https://mega.nz/file/auxXWKCB#kB_HJfUi7Kz0-2Eg23s8QCpL7EbofsHuGOI7UOtAmqE)