dude, i know the specs on sc versions which is why i asked about that model. i wasn't sure if it only came in sc set up. still, the 9.5" wide rim is not the ideal rim to have an offroad tire on.
before i sold my RRSC, I was going to get 20" tires like redmann is talking about on but on those stock 20's which are only like 8-8.5" wide and then have an aftermarket set like 10" wide with summer tires.
also, i just looked at my bfg size sheet, nothing in 20" that will work for our cars without modifications. their smallest 20" is 32.5" tall and ~11.7" wide on a 9" rim. it might work on the rrsport sc if the rim were not so wide but doubtful on the 9.5" rims
so, the nitto 275/60-20 would be cool on the sport but would rub in articulation. however, will you "articulate" much? meaning, on several winter trips i have needed height but not wild articulation because i was in snow on double track/jeep roads. thus, a tall but narrow enough tire could be an option for you. the above 275/60 is just under 33" but right at 11" wide.
after looking at some other brands/sizing, the nitto might give you the least trouble though......
it is interesting how the new generation of rovers have become problematic in terms of modifying for off road use. they could be better by simply having better clearances designed into such things like the control arms/towers, wheel well volumes, etc. for example i had an 06 land cruiser with 285/65x18" (32.5"x11.7") bfg's and had NO rubbing, no clearance issues, no turning radius reductions.
my 2004 discovery has plenty of wheel well space too, and of course can be spring lifted for more.
i am eager for a better company to buy rover, ford is dumbing down some important design aspects.