[Closed] tyre pressure.

The universal standard for all tyres, riders and conditions is 26.3 psi front and 29.8 psi rear IIRC. Subract 10% for tubeless.

Twice your weight in stone minus one for the front, plus two for the back. If they squirm or pinch flat then add more air, if they skitter about or feel nervy let more out. Start out with 5-10psi higher for skinny tyres or if you hit big jumps or pull a lot of G on berms - the last thing you want is burping causes crashes.

Blimey, that puts my pressures pretty low. I think I should eat more.

Tyres, bike, body weight, riding style. Too many variables to just get a number for an answer. Some people use 15% sag on road/touring bikes. Not sure how it relates to mtb though.

Blimey that put mine pretty hi
26" FS with 22% sag 40 PSI front & back
29er HT 50 PSI front & back
And i'll ride anything at those pressures whether commuting on the 29er or big lakes rides on the 26 FS.

"30psi in your Minions
I don't care about your opinions"

I always set my front a tad lower for increased traction and measure by the finger test not psi.

If it has a good bit of push with a finger/thumb then I'm good to go!

Depends on your weight I think.
I run around 22psi but I am pretty light (10st)

Jesus.
What a mine field ! Lol

What tyres for a minefield?

Used to run 28psi, was getting a thorn orgy on every ride.

Increased to 35psi, thorns stopped.

Went tubeless stayed at 35psi.

26" full sus 6" travel.

17 St 10lbs plus riding kit, on the 26" hardtail tubeless, 30 psi front 35 psi rear........same on the 26" wheel full suss and the SS.....or else I burp the tyres on hard edges/ landings/ off camber.

12st, minion 2.5 exo's run tubeless, 23 front, 27 rear.

stan reckons

Rider Weight in pounds divided by 7 = x

x - 1 = Front tire pressure in PSI

x + 2 = Rear tire pressure in PSI

http://singletrackworld.com/forum/topic/tyre-pressures-for-tubeless

thomthumb - Member
stan reckons

Rider Weight in pounds divided by 7 = x
x - 1 = Front tire pressure in PSI

x + 2 = Rear tire pressure in PSi

That's 17 front and 20 rear for me......
No idea if I'm ever near that, the only pressure gauge I have is on an aldi track pump, and I don't suppose that's very accurate. If I feel the rim contact the ground on the rear I put a bit more air in. If the steering gets mushy I put a bit of air in the front.

That Stans thing is interesting as it's roughly what I run.
I've never seen that before.

Basically I run as low as I can without getting more than a couple of pinch punctures a year.

Seems Stans aren't aware of fat bike tyres 😉

The Stans formula is much easier in the anglicised form I quoted - stones x 2 is a more friendly sum than pounds / 7 !

What size tyres are you running?

For the purpose of (trolling) this thread? Specialized ground control 26x4.6, which I run at 8psi 😀

Depends on the trails etc, I'll run 25-30 in the front and 30-35 in the rear depending on conditions, if it is mainly fire trail/dirt road I'll go the high end, technical single track will be the lower end, summer tires are Geax Mezcal on the rear (saguaro in winter) nd something a bit grippier on the front (depending on what the bike shop has in and recommends).

For the purpose of (trolling) this thread? Specialized ground control 26x4.6, which I run at 8psi

If you add a tyre width component to the Stans formula, and assume the standard width is 2.2:

(2.2x2.2)/(4.6x4.6)=23%

Does that work? 😛

Wait, but, no, but, almost yeah. 😳

*goes back under bridge*

It's always been 25-30psi in front 30-35psi at back for me (bit higher if its hard out). But after switching to Maxxis advantages recently and getting my first pinch puncture in ~15years I may have to revise that.

7.5 front, 9 rear - but it is a fat bike.

32 all round but they go down over time some anywhere between that and what it it when they get too squirmy (about 20)