I Have a 2008 fx4 with stock 20's and parelli tires. friend of mine just hooked me up a new set of chrome aftermarket rims and i am a lil confused on all this back spacing and off set stuff. I have a level kit from my 2006 that i can put on also........ The rims I got are American Racing MT100 moto's 20x8.5-
30mm offset and 6.0" of back space. I would like to run 305/55/20's. Can anyone tell me if this combo will work???????? and if anyone has this please send a pic. I was a lil worried about the back space being too much and would this cause to rub or stick out too much???? Thanks everyone!

 

that's almost the exact setup I have. go for it, they will work.

 

Yes, that combo will stick fine. THat wheel will stick out 1/2 inch farther than the OEM wheels.

 

Thanks for all your help....... Your ride is lookin good there wasachevyguy. will post some pics when done., Wandell you seem to be the beast for knowledge here and thank you both again....!!!!!!