Tire Question, 285's on a 9" rim???

HoustonGT

Gilded Gelding
Apr 6, 2003
1,418
0
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Houston
Hey guys. I have 18x9 Cobra R's on my car right now and i'm running a 275/35/18 out back. I'm getting new tires next week and plan on getting something a bit wider in the back. The reason i want to go with a 285/35/18 is because i'm planning on getting a set of DD 18" Bullitts in a few month that are 18x10 in the back, so if i get 285's now, i won't have to get new tires again.
I've asked the question in the other tire/wheel threads and go no real response and used the search button and nothing really.

Basically, is it okay to put a 285/35/18 on a 9" wide rim in the back?