Couple questions

So I have been looking at doing some work on my 2017 SR5 and wanted to see if someone could help me out.

So it's finally time for some new tires and I decided I want to get the KO2's. Can anyone tell me what the biggest is I can go on these with the stock suspension and rims with no rubbing? Would potentially be willing to put some minor spacers for them to stick out a tad but not wanting to raise the truck as of now. I tried to search this but couldn't find what I was looking for but I could have been searching wrong.

Also I would like to update the radio screen to an aftermarket one that has Apple CarPlay. I am looking for a really good quality one that works very well and looks very good. Price is not a real issue here as long as it is not ridiculous. Would like to just upgrade that and not the speakers at this time. Any suggestions?

Thanks in advance!

 

265/75 R16

 

Or 265/70/17 depending on the wheels you have. My stock TRD Sport has 17” wheels, unsure about the other trim models.

 

There is a lot of information and misinformation about maximum tire size on this forum. I think you should search a little harder. That said, my personal conclusion without any actual experience is that 255/85r16 (or r17 equivalent) is the tallest (33”) you can reliably go without any sorts of issues.