The RCVs let go before the 8" third on my rig and I'm rockin 39s for the last few years and 37s before that. She a hard core trail rig.Well, it seems quite vulnerable in the 100 series from all the discussion of blown front diffs on those - maybe because of the shockloads of ATRAC and/or reduced travel with the torsion bar IFS.
And there's 3 or for Minis rocking 40s in our Wheeling group they seem to be holding up just fine.
I can't speak of the hundred series.