I have run 235/85 R 16, with a 2" lift, no trimming necessary, and currently run a 3" lift with 255/85s, and a trim of about half of the flare. If I had to do it again, I would stay st 2" with the 235s. With a 3" lift, you just don't gain enough to make it worth it. Especially when you start thinking score gears ect...
The happiest I have ever been with the truck was at 2" with the 235s.
Ask if that being says, whet do you off road and what do you want to be able to do?
'81 RR 2dr "Miles"
'71 Series 2A "Beeker"
'99 Forester As yet unamed
'89 RR 4dr parts GONE
'96 VW Jetta GONE