I'm running 255/85 X 16s. They are 33" tall. There is a tire height calculator on www.expeditionexchange.com
that can tell you what height your 285/85s will be.
I have OME 751s in front, 755s in back. Makes her stand a bit tall in back, but this spring setup is hard to beat when the truck is loaded. A 110 with passengers, off road gear and camping equip can get loaded up pretty damn heavy in the rear. These springs give a 1.5 to 2" lift. I've had mine this way for 3 years and don't need more.
I can go most places except extreme rock crawl. These springs make the truck very tippy on the road. I'm installing a Scorpion HD sway bar with quick disconnects soon.
I've had to trim the front eyebrows a hair to make room for full articulation. This is easily done with a box cutter.
Can't recommend shocks as I've blown out both OME and Koni HTs from overheating with agressive off-road long-distance driving at speed. I think the continuous near full compression over endless whoops is what kills them. My next set will be Koni HT Raids.
Shocks and sway bar are being sourced from www.4X4ag.com