These are a high quality anodized aluminum hub made in Italy. They are for use on the front of the CRG 125cc chassis. 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.