my 07 h3 came , used, with 265/75/16 goodyear

my friends o6 came with 285 75 16

my op book mentions, in the "tire chains" area,"if your truck came with,,lt285/75/16 or 265/65/18, then,,,,,

so whats stock??

id like to just go to 285/75/16 and maintain stock conditions as i wont be doing much rough, off road stuff and want to maintain warrantee condition.

did my friends used 06 h3 get 285 added by someone

OR did i get 265??

i know you tire guys will nail this!!!

tnx

tom