[Closed] Tyre pressures, mtb

Tubeless, 2.4" minions on Flow Ex, 72kg rider, full sus. Around 27psi rear and 24psi front.

Haven't damaged the rim or burped the tyre yet, but i'm not one for getting sideways. Have destroyed Crests and dinged an Arch previously so i'm not the most graceful rider on rocky terrain. Most of my riding is steep & technical roots & duff rather than flat out bridleway.

2.3 HR2 or Hans Damf - 23 psi rear 20 psi front 73kg rider

would say that over 25psi in tubeless is way to high IMHO

90kg here. 23f/26r Maxxis EXO tyres (27.5f/26r) on 25mm internal EX471 rims riding on rocks, roots, hard, loose etc on a 180/190mm travel full sus.

30-32 R / 25-27 F in Butcher Grids. 115kg. But it's 90% mud and 10% roots.

Seems like I'm running my tyres to high, there not tubeless.
Think I'll drop them to 30psi from and rear and see how I get on tomo

Guisborough and Errington woods are my local trails, wish I was home and riding around in the mud, but I'm away with work for 6 weeks.

Tyre pressure is personal and in my experience depends on the tyre type as well as your weight etc, also pump pressure gauges are a bit hit and miss. So copying someone else's pressure probably won't work.

I normally set my tyres up by trial and error, stick say 25psi in the front then stand on the bike and see how much the tyre squashes down, repeat until it looks like its compressed down maybe a cm or so. Whatever pressure that gives I then add a couple of psi and put that in the back tyre.

Have a good ride, what trails are you riding at Guisborough ?

80kg kitted 26 rear (Vitoria Barzo) 22 front (XR4), tubeless.

I just go for a compromise of what works on the trail,mix of mud n forest tracks at present and some stretches of tarmac between tracks as mostly cheeky single track in local colite estate.

Aldi co2 inflater comes in use full when need to give a boost in presure.

running 2.2 on conti's and weigh 90 kilo

Running lower on tarmac gives that shredding sound or tyre hum so warns dog walkers of my appearance behind em too.

centralscrutinizer,
Planning on riding the newish sow trail, then the usual; les's, snakes and ladders,lovers ledge etc

So many variables... I set mine to 30 on the front and 35 on the rear to start then reduce pressures to what doesn't fold over on hard cornering or risk damage but still offers good grip. Trial and error depending on terrain, suspension setup etc

Minion dhf and dhr2 tubeless on 26" flows. 90kg rider.
Ride mostly at Hamsterley
23/27 psi.
Not the most aggressive rider in the world though.
Conti Baron projekts have much stiffer sidewalls so trying lower tomorrow....

15/17 and 65kg. Although I doubt the accuracy of the pump. They squidge enough under 2 thumbs worth of push.

27.5 tubeless, Slaughter at 30 psi on the back (clumsy rider on rocky grippy terrain), Hans Dampf at 25psi on the front

love the science behind two thumbs worth of push 🙂 there should be an equation for it.



Lee, Magic Mushroom - starting right under Highcliff Nab seemed like the new "in" trail last time I was home.

Oh, not heard of that one, I'll see if I can stumble across it tomo.
Not to familiar with guisborough, only know the main trails. New ones are hard to find of your unsure where you are/going.
I'll have a butchers tomo

Cheers

love the science behind two thumbs worth of push there should be an equation for it.

Here's one I made up:

PSI = 0.6 x Rider weight (in lbs) / (tyre width in inches)^2

Pick a number:

[IMG] [/IMG]

If these feel too soft, pump the tyres up a bit. If they feel too hard, let them down a bit. Put a bit more pressure in the back than the front.

😀

35-40psi. nothing larger than a 2.2 with tubes. probably weigh about 65kg with camelback. I don't like flat tyres and squishy sidewalls.