Another wheel question

So I've read and reread the stickies in this section. It looks like the bolt pattern matches our 6 lug Tacomas which is awesome. When they came out with metric sizing (where there is actually a method to its madness unlike Imperial) everyone was supposed to conform. USA said screw you we're stubborn. Now life is confusing. You never know if your nuts are mm or inches and so on.

Anyways; I'm wanting to run 265's on 18" wheels. Two questions: One is, does anyone know what the offset is for the SR5 16" wheels? It's just a "?" on the sticky. These are +15 offset. I don't want them to come inside the wheel wells more than stock, I want either the same or for them to have a slightly wider stance. Second is, these are 8" wide. The TRD Sport rims are 7.5" wide from my understanding. Will the extra .5" make a difference for not only installing the 265s, but for rub issues? Thanks in advance for your input.

Description: 4 brand new 18x8" AR894's Black with Machined Accents with a dual drilled 6x5.5 and 6x135 bolt pattern and a+15mm offset, part number AR89488067315.

 

Anyone know?