By using this save file, you instantly unlock the following, as seen on eBay listings for pre-loaded memory cards : Unlock all secret racers. All Gears: Get access to all 54 types of Extreme Gear. All Stages: Unlock every track in the game. Max Rings: Start with 999,999 rings. Modes: Expert mode and all missions unlocked. 🛠️ How to Use the Save File (PCSX2 Emulator)
The most reliable source for is GameFAQs . They host several versions depending on your region and the tool you use to transfer them: sonic riders zero gravity ps2 save file link