OK, after searching, I'm still a little confused about the possible source of my violent vibration on my newish Codes. I've only got it one the rear for now. Under braking there is a loud vibration through the whole bike. Haven't tried new pads, but I've sanded the existing ones. Everything is torqued to spec and centered. I came across a post on the Norco board mentioning a different set of chainstays that would fix the problem on those bikes. BTW, I'm on an IH 7point. I also read something about ovalized pivots possibly causing it. My 2006 7point has a small amount of play in the rear linkage. Is this a likely source? What else should I check?