When I first started riding, I ran everything at maximum pressure. On my 27.5 I actually ran it at 35psi or 5 psi over the maximum. It just seemed to roll easier and turn more easily. Now as I’ve been doing more challenging muni and hopping more and doing drops of 8" or so I’ve been experimenting with lower pressures. I currently weigh in at 230 lbs or 105 kg. Tire is a Maxxis High Roller II, 27.5x3.
The lowest I’ve run was 15 psi. At that pressure I found it was difficult to turn and that the unicycle really wanted to roll in a straight line. This was obviously too low for someone of my size and riding ability.
I spent about 2 days riding at 22 psi. I lowered it to this pressure for hopping and found that it bounced well and I didn’t have the steering issues with it. What I did find however was that it no longer climbed as well as it did with a higher pressure and that idling was more difficult. There were climbs on some of the trails I was riding that I had done in the past and simply couldn’t do with less pressure or that took more tries to succeed on.
Currently I’m riding with the pressure at 27 psi. It doesn’t bounce quite as well, but its more agile and I think the agility is what holds me back at the lower pressures. I’m planning on riding it at this for a few days and then trying it at 25 psi.
I actually haven’t found that lower pressure has been much of a benefit in rolling over obstacles.
Anyway, I’m just wondering what others opinions on this are.