I'm not trying to steer business away from Sprocket Specialist. I bought the front one, and it wore out real quick, like I said before. I still went ahead and bought the rear one, figuring that maybe I had gotten one out of a bad batch. That one lasted only two weeks as well. I realize an aluminum sprocket is not the best, but surely it should last longer than that. I'm not going to try them again, and I was just letting everyone know that I had problems, and to be aware. From now on, until I have a problem with them, I'll buy from Sidewinder.