Good morning all, figured I would see if some of the experts here would be willing and able to assist me. I recently picked up a 1993 full size Blazer Silverado. The gentleman I bought it from added aftermarket 18" chrome wheels to it. When I get home from this deployment I am going to switch back to the original 16" wheels with probably LT285/75R16 tires. The blazer is all stock except for the aftermarket wheels. Do I need to worry about wheel offset or tire scrubbing or anything else by going to this size tire? My wife, who bought me the Blazer so I can't argue too much, wants to put a black steel wheel on it instead of the chrome on their now. I'm currently looking at a 16x7 American racing wheel at tire rack but it states this wheel is an "Agressive fitment" and I am not to sure why it would be that way.

Any assistance is greatly appreciated.
Thanks,
Kyle