I got tired of searching for what a 2004-227 Lariat 18" stock wheels offset was. If I remember correctly the stock wheel has 5.75" of back spacing and is 18x7.5. I am looking at eother the Procomp 9001 which is 18x9.5 with -19MM offset and 4.5" of backspacing or the 9005 which is 18x9.0 with 0MM offset and 5.00" backspacing. When used with a 285/65R18 tire, how much further would the above wheels stick out?

 

Stock rims are 18x7.5 with 5.5'' backspacing...

You'll also have to add the extra width of the difference in the tires you currently have and the 285's, but the wheels alone.....

9001 - stick out 3'' further
9005 - stick out 2'' further

edit: I will assume you have the stock 275's, if that is the case add 1/4'' to each of those.

 

Thank's Hawg Man.