[AZgl1800]

I used to weight about 270# and 51 psi was a very good rear shock pressure to make the bike handle better.

Now I am down to 220# and 47# or so feels okay to me.
I have ridden it with as little as 15 psi, but the rear suspension bottoms out on the slightest bumps that way.

But, if you a inseam challenged, then run it at the lower pressure values. That will lower the bike a good two inches.