Fitment Industries has a huge gallery and I did a quick search on your behalf. Here is your exact set-up (tires are different make and model but the same size) on a '14 86.
https://www.fitmentindustries.com/wh...mics-coilovers
Ignoring platform, there are six pages of vehicles running a 17x9 +45 RPF1 in their gallery. This'll give you an idea of what different tire sizes look like on the x9.
https://www.fitmentindustries.com/wh...l_width_from=9
Only thing to really consider when running a x9 RPF1 are the brakes. If you have Brembos and/or any aftermarket BBK, there is a high probability that you'll run into clearance issues as the backside of the x9 spokes don't have the same concavity as the x8.
There is a sticky on this very forum that you might helpful -
https://www.ft86club.com/forums/showthread.php?t=135328