I have an SB54S new for this winter. Other than width, form what I understand it is the same. I am happy with it so far, it will chew through just about anything I've put it to so far and I have not broken any shear pins yet. The only thing is that the shoes could be wider and a bit longer. If you're dealing with a stone driveway or blowing off of grass the blower will dig in a bit if your not careful. I had a set of shoes made for me that I use when the ground is soft and then switch back to the OEM shoes when it frozen and have a good base for the blower to ride on.