95 millimeter in diameter Futaba hub wheels and servo mounting adapter for the Robodyssey Mouse. These parts allow you to flip the chassis upside down and still keep a low and stable profile. I suspect the adapter and wheels should work on other robots, such as the old boe-bots, that have the servos mounted horizontal to the rolling surface. You can see the source mouse and the Arduino compatible motherboard at www.robodyssey.com