Mountain Biking

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If you don't hear your rim hitting the rocks in the trail, you are probably fine going down. If you go up a lot, you can try higher pressure and see how that feels as it will lower rolling resistance.

Then find a happy medium depending on how much uphill va downhill you usually ride.

I'm about 80kg +water and found 24psi to work best for me.

Depends. I have a few setups I run.

Trail bike (Clash 2021) 27.5x2.4":

• 25/f 29/r for higher consequence trails with lots of rocks and roots. I hate squirmy tires, and the suspension eats up most of the impact.
• 24/f 27/r for better traction for more of the daily trail ride conditions.

Jump/SS (Meta HT AM 2020) 27.5x2.8":

• 18/f 18/r for trails
• 24/f 25/r for jumps

On trails, if it's really slick, I may drop 1-2psi for better traction. Obviously, if jumps are slick, I won't ride them.

About 35 psi on 27.5x2.2" Kenda Honey Badgers. I ride XC in an area with occasional lumpy basalt. It can be pinch flat hell with tubes. Even with tubeless I still worry about denting my rims at lower pressures.

i do around 30psi. i use tubes as tubeless is just hopeless on the terrain i am riding (tires develop long-ish slices after a few rides that no sealant could ever fix) due to there being sharp rock shards. tires are Continental crossking 29" 2.2. i weigh like 60 or so kg and my bike is like 20-23 (emtb)