Wheel Conversion Adaptors
This site should help you out. I bought a set from them to mount my Mickey Thompsons on. I ended up using the same bolt pattern(5x135) with a two inch adaptor. It is not really recomended to use these except off road and it puts a lot more strain on the ball joints. Tire companies will not mount your wheels on your truck if they are on there either. So you will need to mount them up your self.
If this site does not help you out, do a google search for wheel adapters.


