Buying used to fit 285s, what measurement ranges for 16" wheels?

I'm pounding away on craigslist for good deals on wheels, and I'd like to know how to measure them to fit my needs.

-I'm moving up to 285/75/16, most likely Duratracs or BFG AT. I'm a daily driver but I like to wheel when I can
-I want 16" wheels
-I don't want spacers

What measurement ranges do I need to stay within for backspacing and offset?

For instance, I know 4.5 BS, but is that a hard factor or can I give a little one way or another?
I noticed that backspacing and offset are related, do I need measurements for both or can I pay attention to just one?

 

4.5" BS has shown to be the best fit for least amount of rubbing. People with 4.25" or 4.75" tend to have more rubbing than those at 4.5".

4.5" is a pretty common backspacing so it's not hard to find an aftermarket rim with that spec.

Backspacing is much more important than offset. For a given backspacing, offset will vary depending on rim width.

For instance, both of the following rims have 4.5" backspacing
16x8, 0 mm offset
16x9, -12 mm offset.

 

Here's a chart that converts rim width and offset to backspacing, so you can check rims on craiglist if the seller doesn't know the backspacing.

https://www.rsracing.com/tech-wheel.html

 

What about those off-size backspacing? Looking at tirerack I only see 4.55, 4.48, etc., so I'm guessing there's some leeway, then they make a 'significant' jump to 4.75" range... I don't have to worry about 4.6" for instance?


I was worried if offset could vary wildly, looks like you say it doesn't matter. At least there's one thing less to worry about

 

There are folks who have fit 33's on 4.75" BS, it just requires a bit more trimming. So there's certainly a little wiggle room when you are talking about a difference of only 0.05" on some of those options.