Not sure about the color of the hub, but the rims are black, which is what I want to stay with. As for the pulley issue are you saying that the Dyna pulley has the offset and won't work with the current build of the Slims rear wheel? If the wheels come with the 25mm bearings already installed, I am going to fit them up, see what adjustments I need to make; pulley, offset and disk, make adjustments and then hopefully get the tires, rim band and tubes ordered.