You can fit them with just spacers, but you would have a slight rubbing issue if flexed offroading. Add in a small spacer lift, like a TF BB and you're good all around. I have 285 70 17's on stock rims, which are essentially the same overall size when mounted. I got a 2.5" TF coil/shock lift mainly for the extra height and raised look, plus gives the option of 35's down the road with minimal changes.
2012 2DR Wrangler Sport, Silver/w dual top. 2.5" Teraflex coil and shock lift with 33" Goodyear Duratracs. Cat back stainless exhaust with resonator removed and Rugged Ridge split dual TP system/K&N Filter and back seat removed. 4.10 gears with Auburn HP LSD. Rampage stainless steel mesh grill insert. Third Wrangler I've owned and fifth Jeep total.
Life is Good!