Be sure to purchase one cap nut for each tire you replace and use the cap nut tool to make it easier to replace the cap nut.
Diameter: 11.5 inches Tread: 5.25 inches.
Not sure which wheel is the right one? Go to the parts diagram page for this and more parts.
If you are still in doubt, please call our store. 732-842-6020 and a Power Wheels expert will help you.