19'' Dually wheels

Starting a project and i need to know the width and offset of an aluminum 19'' dually wheel. I need to know this so i know how wide i need to make the rearend.

6.25" wide and 135mm offset but it does very by brands on the offset what brand of wheel or company are you planning on running?

No idea yet, aside from a huge price difference im guessing the dimentions will determine what i can run. Does amyone have a set for sale or know of a set.

talk to trevor at tennesse wheel and tire.  i think he is on here as well i think his user name is something like lockone.  he is who I got my 19" dually wheels from.  i dont remember the exact dimeninsions but i think it was 6" wide.  with 8" back spacing.  also keep in mind the size tires you will run.  my low pros stick outside my wheels probly 3/4" - 1". 

Most of the 19s we deal with are 6" wide with the 8" backspacing like Stanley mentioned earlier. I have several sets in here Kyle if you are interested give me a shout.