I was talking with a salesman which happens to be a friend of mine today at my Hustler dealers business. He told me they had seen a great deal of deck pulley failures on the Super Z's. Give a response to this thread if you have seen these problems, it may be more than the Super Z's but that is all he mentioned. I got one of the parts people to bring me one of the 6" deck pulleys so I could take a look at it. I said I can see why this could be a problem, that is a cheap bearing put in by the pulley manufacture. I told them that was easily remedied but someone would have to spend more money on a stronger bearing. Hustler has to know there is a problem from their warranty claim records, but there probably is a great number going out just after the warranty is finished. This is a good time for you to let Hustler know if you see a problem with these deck pulleys.