I get the feeling the ruck is not going to be wheeled anytime soon. Hence the OP probably wants a larger wheel which is not the best offroad so the abuse item is probably not that important.

I feel the bolt pattern on the D1 was designed for it and is the strongest one out there. When you look at how that hub and wheel work together they are a thing of beauty.

The spacing needed to make it work too would add another 2-3" to the track width.

 

Hi Guys i am new here, and writing from Colombia South America.
I just installed wheel adapter on my Disco I, to fit Range Rover Hurracaine 18" wheels, the truck looks very good. Not recomended for extreme off-roading.
I will post pics tomorrow.