This post is not about gearing issues, but rather fitment issues. I'm currently working on a BMX build and I'm having trouble finding a sprocket that fits the spoke pattern of the 20" wheels. I'm trying to get the standard 9-hole sandwhich mount sprocket to fit and it seems like no matter how I rotate the rubber ring, one of the holes aligns with a spoke intersection. Does anyone know what kind of adapter and sprocket set up would fit this wheel? FYI, the hub is fairly large since it has a coaster brake.