I have the OEM 20" wheels with those crappy Pirelli's on my FX4. I want to upgrade to an American Eagle 0.64 20x10 w/ 4.626" of backspacing with some Toyo M/T 35x12.5's (6" fabtech lift).

How much farther will these stick out compared to my stock wheel/tire combination? Will I be able to cover over the tread with an installation of the Bushwacker fender flares. My state is picky about this kind of thing, which is why I ask.

Thanks.

 

I believe the oem 20's are 8.5 inchces wide with 5.5 inches of backspacing. If this is correct the Eagle wheel will stick out about 2.5 inches farther than the oem 20's. I know they will stick out 3.5 inches farther than the oem 17 and 18 inch wheels which are 7.5 inches wide with 5.5 inches of bs.

 

What about the tire itself? The rim is 10" wide and the tire would be 12.5, so would I need to add an additional 1.25" onto that 2.5" value to get the full extension?

 

What are those tires? 275's? If so then yes they would stick out 1.25'' further than the stocktires, so add that to the wheels and you have the total.