Replacement bearings for the Cognition V2 DB hubs are part number 11.2018.052.002 (WHEEL HUB BEARINGS COGNITION V1/V2 DISC BRAKE NSW (FRONT OR REAR, 1 PAIR)).
ZIPP service kits and spare parts are best obtained through your local shop or dealer. See our dealer locator, below, to find a dealer near you. If no one is currently listed near you, then please search for local shops via your preferred web browser.
https://www.sram.com/en/dealer-locator
Manuals and additional information about ZIPP and SRAM components can be found at our service site, linked below.
https://www.sram.com/en/service
Further questions?
Reach out to Rider Support by Asking A Question at the link below.