This is 26 inch and with a 160mm travel AM bike and 80kg rider (inc kit) and tubeless. Schwalbe Digital pressure gauge.
It’s horses for courses with tyres and pressures. Too many variables. Start at 30psi and work up or down from there would be my advice and get a digital gauge.
Magic Mary SG at 13 psi on the front and it’s still fine – wet Antur Stiniog. (Rear SG Dampf @ 19psi).
This is for general AM/trails:
A non SG Mary will go 17 psi ok on the front.
I’m currently running DHF 3C TR EXO 2.3 up front at 19 to 22 PSI. It will squirm around sub 17 PSI.
Out back DHR II 3C TR EXO 2.3 or Minion SS TR EXO 2.3 – I run them 23PSI ok. Much less and I’m risking dinging the rim on rocks. Absolute max I’ll go in them is 26PSI though for my riding.
Been great all summer on Maxxis. Had a blast. Fast and grippy tyres, they’ve worked really well.
Dunno what I’ll do for winter yet. Mary / DHR2 maybe.
If I was going to somewhere like Antur with anything other than SG tyres I’d be upping the PSI to the 30+ on EXO or Trail tyres. SG tyres are so worth putting on for there though as they don’t wear out in one day. Everything else I’ve tried is pretty much in the bin from wear after a day there.