I’ve been paying a lot more attention to tire pressures lately, it’s amazing how much difference a few pound can make!
You’d rather not damage the rim, get pinch flats or have the tire collapse unpredictably but you want maximum compression to boost take offs and help absorb landings.
I’ve been taking a tire pump and gauge along on rides where I’m practicing trials skills, to get a better idea of what PSI suits different situations and why.
It’s a work in progress but for me (and my weight) on the 20 and 24 uni’s when mucking around 25-30 psi looks to be a good compromise for most things I’m doing ATM.
One thing is for sure, if the tire pressure is too far out of sync with what you’re doing it won’t take long to know about it 🙂