Zipp Freehub Kit for 176/177 rear hubs is the replacement/retrofit Shimano/SRAM HG‑spline driver body that lets you run 11‑speed SRAM or Shimano road cassettes on Zipp wheels built with 176/176D/177/177D hubs (pre‑NSW). Retailer data indicate the HG body will also accept many 12‑speed HG road cassettes, but Zipp service documentation lists the driver body without a formal 12‑speed claim—confirm clearance before HG 12 use. Kit ships as the driver assembly with seal/bearing; reuse or source correct end caps separately. MPN 11.2018.061.000 (UPC 710845839900).

• Shimano/SRAM HG road spline for 11‑speed cassettes (some retailers list 11/12‑speed; confirm before HG 12 use).
• Fits Zipp wheels using 176/176D/177/177D rear hubs (see wheel model to confirm).
• Not for Zipp NSW hubs.
• End caps not included.
• Driver/freehub body supplied with seal and bearing