The wheels on most are 4 luggers, so hubs for a new axel is available easily. The only things needed to change a golf cart is a new axel along along with sprockets for that, the horizontal shaft motor, a torque averter which comes with 2 different options for sprockets for using either a 35 chain or a 40 chain, a small disk brake for the new axel and the original brake linkage was easily used with that, and a new throttle cable to hit the motor. I did one that was aluminum framed and light so it was the one that hauled ass I mentioned, the other was heavier steel framed and we placed a flat bed made of wood on the back of it that turned into a kids party barge that has made more trips up and down the driveway out here than most cars...I believe both were built for less than $400. My go kart is really light and does 32 mph, which is rough on the body on his bumpy ground. I built mine with quarter elliptical front axel spring set up but that little bit of suspension doesn't help much on my old bones.