We built this robot to be the way it is for many reasons. First of all, we have the arm in front of it to do, basically, everything. This arm is essential to all of the missions. Secondly, we have double wheels on both sides in order to make the robot go faster, because we are timed. We also have a small, fixed in place wheel in the back. That is because if it were just a rod, the rod would drag and not turn consistently. With a loose wheel, it would turn differently each time. Finally, we have wheels on the sides of the robot to move smoothly along the walls, without turning into them.