Back spacing issue?

[Jason Wiechec]

Found a nice set of rims in sizes i want. 18X8 front 20 x 10 rear the tech guy from the site says for the front the back spacing is 4.5 inches will there be a issue with tire rub and the rear is a 5.5 inch back spacing. will there be an issue here and what can i do to remedy it

[Captkaos]

stock or dropped, either way they should be ok.  Just measure to be sure.