P38 tyre size

What is the largest tyre size you can put on 16" alloys without modifying the body? The truck has coils not EAS!
I want to put General TR's as I have found these fantastic all round tyres on my previous Discovery. They are standard fit on Defenders so I think that speaks volumes. Had AT2s but no better than TRs off road and especially on road.

Thanks for reading
John

Loads of info here on tyre sizes that fit without mods and those that need em: rrtires

Many thanks very useful!