The Silent Spinners only come in mini & 6.5 and 12 in. I think you mean the Silent Runner? That has to be ordered and it comes in yellow 9in and orange 12 in.
If you can get the orange 12 in your hammie won't complain. The yellow isn't really made for dwarves but for small Syrian but because the wheel moves so freely a dwarf can be very happy with it. I wouldn't recommend it for a robo though
