These are a high quality anodized aluminum hub made in Italy. This is the OEM CRG front hub. These hubs are meant to slide onto a front spindle.
3/67 Bolt Pattern: 3, 8mm wheel studs pre-installed that are 3 on 67. 3 on 67 stands for 3 wheel studs at 67mm apart. 67mm is measured from the outside of one stud to the outside of another.
Meant to slide on the 17mm size spindle.
Available in three lengths.