On a std rim about 4-5 mm clear of the wheel nut, on a OEM wolf about 1-2 mm clear of the wheel nut. I think there is a pic with a ruler in the thread I linked to.
My trials began when I realised my 235/85 BFG ATs were 20 years old. Once I had to get 4 tyres I decided to do some (well a lot) of research. It became clear the whole area of 4x4 tyres has moved on a lot and the lastest generation of all-terrain tyres are impressive bits of tech. One intersting this I found was that 235/85 -16 is the default size for these so its the size with loads of choice. Be aware that there are 2 235/85 - 16 sizes - 235/85-16 and LT235/85-16. An LT is "light truck" and its a much heavier squarer tyre, it typically has 116-120 rating (thats 116 on a twin wheel set up and 120 on a single) which is around 3000 lb per tyre. Often the LT is actually cheaper than the non -LT because its a commercial tyre.
The std 5.5J rim used to be specced as the min rim width for a 235/85, but that info has been updated to show 6J so its a bit tricker to argue its OK even if it fits. Im a Chartered Engineer and my truck is MOT exempt so I have no defence of ignorance, I need to play by the book.The 7.50 R 16 is a radial and approved for the 5.5J, but there are fewer and fewer tyres this size. Its a 100% aspect so you get the hight - its about 31-31.5" dia, an LT235/85 is around 31.7" dia. The problem as I saw it was that the 7.50R16s are very off road biased, noisy and usually poor wet grip. To get the low noise, mud/snow, highway and wet grip you need a lastest generation 235/85 A/T tyre. Really that means a 6J or 6.5J rim. Ideally there would be a 6J version of the series / defender wheel but the choice is limted to modular, wolf copy or Wolf/LR Heavy Duty. I bought a modualr, wolf copy and OEM LR HD rim and compared, the OEM Wolf/HD wheel is the best which is why I stumped up £140 for a used set and that was a keen price. The copy ones are around £45 each new. The 5.5J wheels are £5-£10 each at most so the market has decided.
I think it comes down to a clear choice - 5.5J with 7.50R16 for shows and short trips, but if you intend to drive, especially on the road, then its 6.5J (Wolf or copy) and modern tubeless LT235/85 16. This is big investment, I shopped around for ages and still the 4 wheels and tryes cost me around £600, here an example:
https://www.ebay.co.uk/itm/Genuine-...736107?hash=item34228980ab:g:AN8AAOSw321eS92W
https://www.ebay.co.uk/itm/4-Land-R...070013?hash=item3b4bfef2fd:g:8U0AAOSwugtfKxJo
Note the massive difference in price and ask yourself "why?"
My take on what is going on is that people think the 5.5J will become obsolete with only a few over priced tyres to fit.
We are driving around 200 miles this coming week with a loaded LWB and loaded Sankey and I am much happier doing this on 235s on 6.5J rims. A related issue is that I've done a lot of work on the brakes and now on drums it stops really well, I'd be unhappy on a 7.50 vs a 235 especially in the wet.
I hope this wasn't too long and answer but I felt your honest question deserved proper consideration.
I bought these becuase I good a good deal (£105 each fitted) on the LT235/85-16
https://www.yokohamatire.com/tires/geolandar-a-t-g015