AhhUmaddd

Man its been a while since I posted in these forums. Alright so I have Epic Springs I managed to pick up from a forum member a while ago with KYB excel G struts BUT, I'm currently on stock suspension. My wheel size is 18x8 +48 and I have BFGoodrich g-Force COMP 2 a/s 235/40r18 tires on them that are currently on the car but getting a 'lot of rub in the rear when I hit a slight bump or take a corner hard. My questions, if I get the same tire but 225 instead of 235 and I install the new springs/struts, will I get rub and will that suspension set up be good? I cant seem to find anybody with that combo.