Bought a couple of used karts last month. The person I bought them from said they were from a closed down mini-golf/go kart place called Gasoline Alley in Blaine, MN. Anyway, these karts are well built but have some interesting things to them. First is the 5-bolt 6" rims and hubs. I cannot find replacements for them anywhere. Hopefully I won't need to I guess. Just gotta keep those bearings greased. 2nd is that these have either a differential or fluid coupler of some kind. When I spin one of the drive wheels the opposite side spins the other way. They seemed to corner really nice and now I know why. They are in pretty good shape considering their age and are just perfect for my 2 kids to drive around (and I drive them around the neighborhood too!). Trying to find good sources for parts for them, seems outside of the wheels and hubs they use mostly standard looking components at least. Plan to buff out the paint and change out some of the rusty/corroded pieces.