Replacement bearings for the ZM2 SL hubs are part number 11.2028.061.004 (HUB BEARINGS – FRONT/REAR - ZM2SL - 2x 61803 Carbon Steel bearings).
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.