Is the ZR1 disc hub offered as 6 bolt or Center Locking rotor interface? August 10, 2021 13:56 Updated The ZR1 disc hub is offered as Center Lock rotor interface only. Lockrings are included. Related articles How do I service my ZR1 hubs? What if I accidentally damage my Zipp wheels during unintended use? Is the ZR1 hub available with Shimano MICRO SPLINE and Campagnolo N3W driver bodies? Comments 0 comments Article is closed for comments.