Im looking at two differnt wheels, Bu I got some quistions about them. First, can I put a 11.5" wide wheel on a 10" wide wheel, and which of these will stick out farther. Diamo 17 karat 17x10, -12 offset and 5.03 backspace. and eagle alloy 197, -11 offset and 4.50 backspace.

 

You didn't list the rim width on the Eagle Alloy.
Also, I ran 285/75-16 (33x11.50) BFG AT KO's on 16x10 wheels for 60,000 miles with no problems.

 

Sorry, the eagle alloys are 17x9

 

The Diamo's will stick out 3 inches farther than your stock wheels and the Eagles will stick out 2.5 inches farther than the stock wheels.