1616 Series Drop-Center Bearing Plate (2mm Drop) - 4 Pack

This drop-center plate is designed to give you a way to mount your bearing 2mm offset from its normal position. A common use would be on a 6-wheel chassis. They would allow you to "drop" the center wheels or raise the outer wheels in order to focus the load on the center wheels of the chassis. This effectively shortens the wheelbase resulting in a chassis that will turn quicker and easier.