Don't forget that whatever you fit, the overall diameter must be at least as large as the original fitment. Bigger is fine, but smaller and you run into potential legal hassles.
'Cos the law says so! Unless it has changed in the last few years, Construction and Use regs are that wheel/tyre combinations have to be at least as large as the OEM fitting.
We had 19" RR Sport wheels on our D2 when we bought it, couldn't get rid of them fast enough.
18" are better, and if you're on air suspension that helps as well, but decent 16" 255's are the best in my experience, 235's not as good.
Peter
IMO you can use what brand you want but in the attachment are the official original fitments from the book... i've had them all(the dimensions) from there over the years and i ended up on 255/65/16 which IMO is the best ever
I've had a few conversations with tyre fitters over the years regarding this - some of them seem to think it's OK to put smaller radius on, but when they check they find they shouldn't.
They do fit (with spigots etc), but they are too extreme I found when I bought a D2 with them on. I removed them for 18" at the time.
As the rim diameter increases. the height of the wall reduces, and the inflation pressures start to increase. That's why they are so hard a ride, you haven't got the tyre height to cushion you against the bumps.