Hi, I'm interested in building a yard kart with my brothers just to do a little on and off road driving, but nothing to harsh. I'm trying to keep it to a very low budget project and I have a few questions. I'm planning on doing a fixed axle because this seems to be the easiest and cheapest, but I'm unsure of the best way to mount the wheels. I know I will need a sprocket and brake mounted to the drive wheel hub, but would I simply weld something like a bolt onto the frame and attach the wheel with a nut. I'm assuming I would need to make some kind of pin to keep the nut from backing out and I guess some grease would be good to reduce wear, but does anyone have any suggestions?