My new 2004 Iron Horse SGS DH pro, after three rides, has decided to break the main pivot bolt where the chainstays mount to the frame (near bb). The set up consists of two collars w/ flat allens heads and a single stud that threads between the two. The stud is the piece that broke, or sheared. Has anyone else had this problem? does it seem just to ask (warranty) for replacement hardware to cure the problem? I am not sure, physically how that particular piece could have broken, It doesnt seem that the threaded piece between the two provides much in the way for torsional strength, it seems it would only provide tension between the two collars holding them in the bearings and the frame.