New owner seeking tire fitment etc.

Hello all,

Recently purhcased a 13 800S and was wondering if the stock tire size is the largest that can be fitted, or would a lift be more appropriate to run a larger tire? I don’t have access to many things to experiment with tire/wheel fitment.

And on that note, is it ok to run the same tire width front and rear so I can carry a common spare, or is it not advised?

I am currently installing my snorkel kit and was wondering what else besides the diff breathers that come with it should I do to help with water proofing? I really enjoy going through the deeper water at my local atv park with my quad that just has a snorkel kit and rad relocation (Air box RTV’d.)

I would like to do that as well with the RZR.
Attached are a few pics of the 800 and my 170 I bought the kids.