Most are saying about 5000 miles . I am on my 3rd set at 14,700 miles. You can try to run them longer , but when you see how compressed they are at the contact points you will want to replace them . These hubs should never have been used by Norton/Skinner , KTM have had trouble with them years ago and they were using the same type rubber bushings. These hubs were discontinued more than 7 years ago according to TALON ! That means when my 2014 was built these hubs were already obsolete. Norton must have got a lot of them cheap is all I can think of at the moment. I am rather disappointed that my premium motorcycle has been let down by these not fit for purpose rear hubs. I am sure that a suitable rear hub was available to Norton from Talon at a higher cost. OR DID or any other ! We've been getting stuffed from the beginning !