Razor E100/E125/150/E175 Electric Scooter Rear Wheel Replacement Razor Rear Wheel Assembly for the following CHAIN DRIVEN Razor Electric Scooters: E100/E125 (version 33+) E150 (version 18+) E175 (version 29+) **NOTE: Razor Scooter versions can be determined by locating your bar code ID on the bottom of the scooter/deck. The 7th and 8th digit in the series will tell you the version of your product: 01=version 1; 02=version 2; 09=version 9, and so on. CLICK HERE to view an example of the bar code you are looking for. Razor Part #W13111260148 Chain D rive Overall Diameter: 5.7 inches Uses Bearing #608z Width: 56mm Width (including axle): approx. 165mm **Note: Please confirm your Razor Model and Version number before ordering. See Chart image.