Taking an old tractor style mower and making it a slammed drift kart. I have never owned a go kart or built one so im going to enjoy making this for me and the kids. Frame is 14 gauge square tube steel. 1.5" by 2.5" if I were to do it again id probably just do 1.5" square. Still need to buy the front wheels ans tires, going with a narrow 5". The rears are 8.5" and they look nasty with a 8" wide tire.