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 comes in 2 pieces and simply slides together. You don't use the 2 center screws on the driver. You can use them to tap into 2 of the 4 nubs in the wheel if you want extra strength.

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.