I have a 2004 jeep TJ sport 4.0L. I'd like to upgrade the jeep by putting 33x12.5 on it. (I know about all the lift, the backspacing, regearing info). What I'm not aware of is if there are any laws in NSW that I'll encounter when trying to do this upgrade. Is there a limit to the size of tyre you can change to? I don't want to have any problems getting a yearly pink slip.

thanks for your help.