Got this stuff from a friend who needed help cleaning out garage after her divorce. Have lots of racing wheels and tires. Know that the engine was built for a racing kart but friends son was using it to build this kart to drive around the house. There is a rear axle w/ hubs, a brake rotor and a sprocket. was gonna try to build this for my kids but have had it for about 2 yrs and have not touched it and is pretty much in my way. Give me $100 bucks and all of its yours.