i need help about bearings

[tomfc]

can someone please tell me what bearings do and where abouts in the wheels they acctually go?

and if it is at all possible could you show me pics? :-? :-?

[jpringlephoto]

There are 14 in total when you use a 4WD setup.
(6) in the rear, (6) in the front, (2) for the shaft.

The (6) in the rear has (TWO) in each individual wheel axle, and (ONE) on each side of the differential (white or red) gear.

Remove the plastic rings and replace it with a bearing each time.