I've got 235/75/15's on mine but have done a fair bit of hacking and chopping just to avoid having a 2" shackle lift. Got a small shackle lift now, 1/2" maybe, just to give a bit more clearance. My old 410 had a small shackle lift with the same tires on, litterally, and they caught the arches quite badly but i found it ground the rust off nicely :D
The biggest issue i found was clearing the springs when turning. Hence why we reversed the wheel centres. But following the little episode of one falling apart, my new wheel spacers arrived this morning! :D