Sand tire air pressure, how much?

[G-Town]

How much air pressure do you run in the sand on skat trak haulers. I was running mine at 4 but I dropped it to 3.5 the last time I went to the dunes and they seem to grab up better.

[0101]

I run mine at 2.5-3

[Wheelie]

I run my 8 paddle extremes at 4.5 psi.