Well brandon it looks like u got alot to learn about, but its ok its a fun process. I have been tractor pulling since I was born, my mother, aunt and grandfather all do it. In fact, we are kinda a force to be reckened with in southwestern PA and Ohio. But for your question the purpose of tin wheels or aluminum is to loose some weight. The meaning for that is so that you can get into a lighter class, which hopefully lets you run a higher gear and have more power. However, the key to pulling, well you just have to email me for that secert email@example.com
. But it all depends on what your pulling and what class a,b,c and weight class you want to pull. If you are confused email me and ill explain everything you need to get started...Good luck!