Bought an Ironman front 13T sprocket a while back. Went riding yesterday and notice a lot of side to side motion in the sprocket. The retainer that came with the sprocket and the sprocket splines all line up exactly. The only thing keeping it from coming off was the chain hitting the frame. I didn't hurt the frame but I can tell where it was rubbing some. I have been riding with the sprocket like that for awhile. I checked it against the stock sprocket and if you align the retainer holes the splines on the sprockets are offset like the retainer should be. Has anybody else ever seen this with any sprockets before? I guess the holes in the sprocket were drilled in the wrong place. The stock retainer lines perfectly also. I'm going to get with Ironman and see if they have ever come across this.