Im ordering 20s and need to know what back spacings will need and off sets will work... I have a 1993 toyota pickup..
more info needed... start with how wide... how many other mods you have.. and if all else fails find a tape measure.
+45 or higher if possible, and no lower numerically. I can't say 100% that's what you need, but they're going to need to tuck, so the higher the number the better. Look at wheels in the +45 and up range. It's always a guessing game. I told the dude at Big O I need to put one on my truck before mounting a tire on it and there was a chance we may be ordering something different if it doesn't work. A good counter guy will do that for you, if not, tell him you're going somewhere to get some actual help.
Well *up* is the direction they'll need to go. The lower the number, the more they stick out toward the fenders.