This is our upgraded rear inner hub for many Power Wheels Dune Racer models.  It replaces the stock part number 3900-6803 . Check your parts diagram to see if this is the one for your car. The new driver comesin 2 pieces and simply slides together.

Do not add rubber to your tires.

Home fabricators can use this kit to lengthen or shorten the width of the rear wheels too! you will need to make a new axle if you do.