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[darreldudley]

When I started MTBing 35 years ago tyre pressure was about 30psi, I still keep them around that now, mostly because I'm fat.

[nojhead]

an aspect often missing from this debate is body weight too and given newtons law applies the pressure in the tyre is resisting your weight- a simplified example ignoring weight of the bike:
if you weigh 200lbs then 20 psi means your contact area is average of 5 inch square per wheel (200lb/2 wheels =100lb per tyre (simplified as weight distribution may not be 50/50. Then at 20 psi 100lb/20 =5 inch square.
A 130 lb rider will have lower contact area.
A 250lb rider would have even more.

Given my history of 20 years of powerlifting I’m around 260lb (117kg), so i typically run upwards of 30psi. Gives me a similar contact area to a 70kg rider running 20psi.

[HankBizzle]

There's a pretty handy calculator on Schwalbe's website that tells you what pressure you should aim for. It uses your weight, tyre size, tube or tubeless and usual riding style to calculate the pressure you should aim for. It's definitely not a one size fits all thing.

[sq]

With tubeless, I'm running 22 at the front, 25 max at the back, but happy to adjust mid trail if conditions warrant it.

Prior to tubeless, I was probably running 40 front and back but getting so many pinch flats that I transitioned to tubeless. Have only had two flats in the last 10 years and they were side wall rips from rocks, so it was definitely worth the transition.

[fading]

It does depend on what discipline you are riding, for example for freeride i run about 60-65 psi, but for trail riding its more like 20

[parisrose]

This gut has obviously never been heavy. I'm 123kg and anything under 35 and the tyres try to peel off and the bike sways from side to side while traveling in a straight line. I run 40 ish in the front and 45 in the back., I don't real care where the back wheel is, it tends to follow me. I'm up at 60 on gravel.

[Sustrii]

that silver stoic 4 looks nice in the distance and blurry, the moment it get close you just wanna cry

[gp]

15 front 17 rear, 2.6 Assegai / dhrII, no inserts, 77 kg, hardtail, no issues

[Djacob_]

My gravel bike: 700c x 37c at 60psi. If I’m going down a steep enough trail, my rear wheel can be completely locked and I’ll still be going down too fast. Those are the only times I wish I had my mountain bike.

[dumbr]

I run 40 in the rear, 30 in the front.

[zgdovyo]

I’ve been running 20-25psi for trail riding and 30-40psi for downhill. I might drop it down for races but I believe you’ll ride better knowing you aren’t risking a flat every rock you bash

[gibbykirwan]

Met a chap recently, new to MTB with 60psi in his tyres 😂

[ecopennylife]

I run tubeless MTB tyres at 30psi front & rear for trails, 40 or 50 if I was doing high quality gravel or tarmac.

[andyk]

When I got into mtb. I was running 50-60psi...lol. This was 20 years ago at least. With tubes even.

[ianmangham]

Can't go wrong on or off with 30 psi 😅

[russellparker]

It’s not grip or pinch flats that I am concerned about, it’s having the tyre maintain predictability when you’re driving it into berms and take offs

[i-_-am-_-g]

Tubeless on a 155/170 enduro bike, 45 to 55 psi season dependent... 15.5 stone

[theinterwebs]

I'm at 60 psi and when I gain speed down the valley I can climb out far quicker then at 30 psi

[jaredb]

"most people have their tyres set too hard... about 50 psi. You want a lower pressure tyre..." Doesn't bother telling us what that is. Thanks.

[trailnnja]

Guilty AF! My first race I had 3 bars front and back.