OK Wheel/Tire experts. I need ur advice.
 

Ok I ordered the Boss LS rims instead of the TSWs. Anyway they are 19x9 and 19x10 for the rear. I need tire size suggestions. My stock size is 245/45/19 but i was thinking of going 255/40/19 for the front and 275/40/19 or 285/35/19 for the rear. Keep in mind I'm not lowered and don't plan on doing so at the moment if that helps. Also I was thinking of getting the Continental ExtremeContact DW as the tires.

Click on your link then click on Specs. They have a list of the proper wheel width to use with different tire sizes.