Zipp’s SRAM XDR Freehub Kit is the replacement/conversion driver body for Zipp wheels that use the ZR1 rear hub, allowing installation of SRAM XDR 12‑speed road cassettes (and XD mountain cassettes with 1.85mm spacer per SRAM guidance). It swaps in place of the stock driver to convert drivetrain standards; confirm your wheel’s hub model via the SRAM Service Hub (serial lookup) before ordering. Kit is sold as a Zipp spare part (SRAM Model ID HU-SPP-A0; MPN 00.2018.015.000; UPC 710845855023).

• Fits Zipp wheels built on the ZR1 rear hub (e.g., 101 XPLR and other ZR1-equipped Firecrest/utility wheel codes listed in service docs).
• Supports SRAM XDR 12‑speed road cassettes; use included/appropriate 1.85mm spacer when installing XD MTB cassettes (Eagle 10‑50/52, 11‑speed 10‑42).
• 12x142 thru‑axle or QR compatibility per ZR1 hub configuration.
• Replacement freehub/driver body with bearings installed; end caps not included (order separately if needed).