The DLC is included for Season Pass subscribers, otherwise it can purchased separately for $4.99.
Also of note, RIDE 4 is coming to PlayStation 5 and Xbox Series X|S on January 21, featuring dynamic resolution up to 4K/ 60 FPS with up to 20 bikes, both online and offline. If you missed it earlier in the week, the team released some new details on their PlayStation 5 DualSense advanced haptic feedback features.
If you already purchased RIDE 4 on the PlayStation 4, you can download the PlayStation 5 version at no additional cost until April 30. All of your DLC will be included. The same goes for Xbox One gamers, you will be able to automatically download the Xbox Series X|S version of the game at no additional cost on January 21.