Wheel Help!!

Hi Guys,

I owned a 91 mazda B2200 bodydropped.
I am currently running 16" wheels and i want to upgrade to 17's

what size wheels should i be getting??? like should it be 17x7?
and what is the offset? or backset??

i don't know a lot about wheels offset. any help will be great here are some pics

love the paint, not sure about offset on wheels, i think mikeys 18s are a +30 if i remember right...

but thats also with 4wd sheet metal...

im runing a bd and caddies 17s and the are 32mm or 34mm offset dont remember, but they rub just a little bit with 215 50 17s so i think i 205 would clear no prob, again 4x4s but...anything higher then body line is the same on both 4x4 and 2wd fenders