How do I service my ZR1 hubs? August 11, 2021 21:47 Updated See the Zipp ZR1 hub service manual. Related articles What if I accidentally damage my Zipp wheels during unintended use? What bearing size does the ZR1 hub use? What tubeless tires are compatible with Zipp’s hookless rims? How many points of engagement does the Zipp Cognition V2 rear hub have? Comments 0 comments Article is closed for comments.