Zipp’s SRAM XDR Freehub Kit for 176/177 hubs converts legacy Zipp rear hubs (176/176D/177/177D; pre‑NSW) to accept SRAM XDR road cassettes and, with the included 1.8 mm spacer, SRAM XD mountain cassettes (including 11‑speed). The aluminum driver body installs in place of the existing HG/Campagnolo body using the standard 176/177 hub service procedure; end caps are not included and must match your axle format (QR or thru‑axle, depending on hub). Sold as a Zipp spare part under MPN 11.2018.062.000 (retailer SKUs vary); UPC data conflicting across retailers—Not specified.

• Fits Zipp 176/176D/177/177D rear hubs (not NSW).
• Accepts SRAM XDR road cassettes (12‑speed and other XDR).
• Use included 1.8 mm spacer to run SRAM XD cassettes (incl. 11‑speed 10‑42) on XDR driver.
• Aluminum freehub/driver body; pawl‑ring interface per 176/177 hub design.
• End caps not included (reuse existing or source axle‑correct caps).
• Compatible with numerous legacy Zipp wheel codes using 176/177 hubs