I'm only coming up to 2 months off-roading so take my opinion as you will...I don t intend to take on anything more than a moderate trail
I haven't aired down once since I'm not rock crawling. Still at 37psi.
It doesn't mean I'm not hitting some really intense, rocky uphills at 20% and 3 miles long etc... The kind if I had no seat belt I'd have brain damage and fly out the passenger window... But instead of just airing down from the start when I bought the jeep - I decided to see what I can do as it is.
There are definitely a few instances lower pressure would have helped - but still didn't need it.
I would say some of the climbs I've done are more than moderate... Terrain just plays a huge part...
Regardless I did buy a Viair 300 and some auto deflators - which I do not take with me and haven't used yet... I'm sure I will one day. My rides are bumpy and jittery as hell!