Quote Originally Posted by r3ckless View Post
Not really to be honest. I've almost hit 260km/h on aftermarket wheels (center bore bigger than 64.1mm) and on very decent street tires. I felt no vibrations. Also like I mentioned in another thread on OH, many people track their cars on aftermarket wheels.

Michael, to be safe, get hub rings - their a cheap investment. I've got 2 rings u can have for free dude, I lost the other two when I sold a particular set of wheels. My 2x hub rings are inner: 64.1mm, outer: 73.1mm. If anything chuck hub rings on the front as thats where the load is.
Well, you had a lucky combination.
Others may not.
But thats the normal thing, no hub rings are the most likely cause of vibration.