I am sure this question has been asked many times but I can't seem to find a thread about it.

I am planning on getting 18x8.5 +48 Rotas. Will the +48 offset on a 18x8.5 make the rims sink inside the fender like the stock rims? Currently on TRD springs

and what would be the lowest offset I can fit on TRD springs? I looked on the New wheel fitment thread but it only says that I will be tucking, I just want to know how bad.

Commence Rota Bashing...I guess

 

18x8.5 +48 will still be sunken in. trd springs barely give a drop, so you can put almost any offset you want.

 

depends on the tire width you are looking to get, you might need to either roll your fenders or get spacers. I think you should look for an offset closer to +45. And not to have your rims too much inside i say have the offset between +42 and +45,46.
I actually want to something similar to it, but the specs i need arre 17x8.5 so i can 255 tire all the way around and i still dont know what exactly i need as far as either rolling fenders or spacers to make it work properly.