Zipp Freehub Kit: Cognition Disc / Rim Brake NSW, XDR, Generation 2

Freehub bodies for Zipp Cognition hubs. 1.8 mm spacer is included for use with XD cassettes For Gen 2 Cognition hubs manufactured after the 21st week of 2018 (serial number would be 21P8 or higher, such as 51P8) Gen 2 hubs feature a one-piece axle system E