My Disco has a 1" lift on it and I have 235/75/15 tyres on it now, but these are looking a wee bit small with the lift kit.
I was looking at other sizes and let me have a look at 265/70/15 Goodyear Wrangler AT's, which when parked alongside the disco, were only 0.5 inch taller but much better width.
I know these need to be on a wheel and inflated before you get a real idea of the correct size but it's gave me an idea of the size.
On my old Rangie (see pic's in other post) I had a 2" lift with 31x10.5x15 tyres, I had to fold the lip of the wheel-arch double but nothing else. :s6