Rear wheel assembly compatible with: E300 version 41+. The rear wheel assembly includes the tyre, inner tube, rim, drive sprocket and brake assembly. Razor Part #W13113614048 Note: Model versions can be determined based on the product ID code on your Razor product. The product ID code can be found on the battery cover and/or on the bottom of the frame. The 7th and 8th numbers in your product ID code are the version number of your Razor product (e.g. "01" = Version 1, "02" = Version 2, etc.). Download Owner's Manual E300