This probally falls under the Noob category, but I just got my tuner and I have never used one, so bare with me! Ok, I bought a used X3 tuner. Its unlocked. It has some custom tunes for a different strategy than my PCM has. I'm not worried about the tunes and dont plan on using them. I will contact AM when Im ready for my own custom tunes, I just dont have the cash for it right now. Can I change my tire size with this tuner even thought its currently set up for a different strategy? Can I do this? Does the strategy affect the user adjustable parameters? Or will I have to have the new tire size incorporated with a new tune? Thanks guys.