Wheel Offset -12 or +18 for XD797 Spy Wheels

[RAMblin1217]

If you go with -12 and get Bushwacker Pocket flares you'll cover the entire tire with them. I have them with -24mm offset with 35x12.5r20 tires and get very minimum dirt on my door or the rear of the truck.

 

[Steen]

09-2016 RAM 1500

285 / 70 /17 ON AN 8 OR 9” WIDE WHEEL
315 / 70 / 17 ON AN 8” WIDE WHEEL (MINOR TRIMMING REQUIRED)
33” X12.5” ON A 9” WIDE WHEEL (MINOR TRIMMING REQUIRED)
ANYTHING LARGER, TALLER OR WIDER IS BEYOND CST RECOMMENDATIONS AND UP TO THE INSTALLER.
MAXIMUM BACK-SPACING IS 5 Inches

This is straight from CST's website.

I would assume it's based on the wheel setup too. Seen a guy running a 305/45R22 on an 22x11 with a -24 offset on stock suspension with no trimming or rubbing. Actually looks pretty badass...