widest tires on 16" trd rims?

Hi guys i have an 07 access cab prerunner trd-offroad and according to the sticky in this section my rims are 7 in. wide, so my questionn is, what is the widest tire i can safely run? I plan on running the ome all around lift which i think is a 2" and i might also add a 1" spacer (but generally i'm against spacers) thanks for your help everyone

 

Approx 10.50"

That has NOTHING to do with the amount of lift you have.

It's more about the width of the wheel vs the width of the tire.

If you run a tire that's TOO WIDE for the rim, can be unsafe. Depending on the tire pressure you run with that combination, you can wear out the tread a lot quicker and can be unsafe to the sidewall in turning.

Here's some neat wheel info:
https://www.rsracing.com/tech-wheel.html
http://www.tirerack.com/tires/tiretech/tirespecskey.jsp