Hiya just out of interest what psi do most 29er riders put in they’re front tyres.

I had hoped in would get away with riding with about 25psi I have heard of people running less, 25 psi doesn’t work for me even when running tubless I get flats caused by the tyre casing getting damaged, I’m riding with schawlbe rocket runs at the moment.

29, sometimes 33 though.

Do I have to be the one to point out their/they’re/there?

Well I’ve done it now, so their/they’re/there… 😉

What pressure do you run in your 26″ wheel tyres? Cos it’s the width and your weight that affect the required tyre pressure way more than the diameter of the tyre. So if you ran 30psi in 26×2.2″ tyres, you’ll probably want 30psi in a 29×2.2″ tyre if you get me.

MBoy – ‘Thanks for the spelling corrections 😉

I’ll prroof reed my posts from nuw on.

I’ll prroof reed my posts from nuw on.

Good lad, that’s what I like to see! 😉

32.45666

Less than 2bar sometimes

Tubed 29er. 25psi front, 28 rear. No issues for me 🙂

2.25 RR/NN tubeless 20 front and rear

29 psi obviously.
It says so in big writing on the side.
Derr.

30 front 35 rear 26 or 29 😀

What ever my pressie down thumb says

40psi front & rear.
I’ve had slow punctures in the past and by the time it gets to about 25psi it feels unrideable to me.

Take the pressure you run in 26in tyres divide by 26 then multiply by 29 😉

i don’t give it nearly as much consideration as some.

Somewhere about 30ish to 35ish on the dirt tyres, up to about 40ish on the road use tyres.

85Kg’s, usually run ~24F/~26R, rigid, HT & FS, although on a recently fitted Hans Dampf rigid front 18psi seems spot on

18 at the front and as low as 15 on the rear – with tubes. Usually run RR or WW on Gordo rims and a rigid frame.

It depends what air I’m using. Air at some trail centres feels harder than others at the same pressure.

20 psi front (25 rear) – tubeless Maxxis Ignitor 2.1s. I’m 16+ stone. The bike has a sus fork.

between 15 and 35 psi depends on the tyre.

my normal 2.4 racing ralph is at ~25psi.

29erSSRigid here so run 30 on the front and 35 on the rear, on 2.0’s BTW.

About 9 or 10 psi

Surely this depends more on your weight and the terrain you’ll be riding rather what tyre your running?

It depends what air I’m using. Air at some trail centres feels harder than others at the same pressure.

I’d never thought of this before.
I normally blow my tyres up at home, where I’ve got trees overhanging my house.
It’s a well known fact that woodland air is softer than city air, maybe that’s why I need more pressure than everyone else.

I like how nobody has mentioned riding style or terrain.

EDIT – ads678 has, but that wasn’t there when I was typing 😉

tyre pressues…the eternal mystery… for MTB between 10psi and 50psi depending on the following:

tyre casing width
tyre casing height
tread pattern
tread rubber compound
tubless or tubed
casing compliance
casing thickness
rider weight
rider skill
riding speed
rigid, hardtail or full sus
long or short travel
tarmac or dirt
which kind of dirt
whether there are rocks
big rocks or little rocks
gravel?
sand?
whether it is dry or wet
or icy
or snowy
or dusty
** other variables I’ve forgotten **
personal preference

mostly a good starting point for your average sized MTB tyre is 30F, 35R and then adjust either way to suit depending on above, just because some people swear by pressure X, doesn’t mean you will like it or get on with it.

100 million front. 100 million rear

Another contradictory STW thread, with not much help to the OP 😐

Twice your weight in stone, minus one for the front and plus two for the rear, is a decent starting point for tubeless tyres in general. Bigger tyres lower, smaller tyres higher, rockier higher, slippier lower, smoother rider lower, more aggro rider higher, etc.

Another contradictory STW thread, with not much help to the OP

If I were the OP i would try lots of different pressures and decide for myself which I liked the best.

On my 26 I ran 20ish front and 23ish back. (This is according to the meter on my track pump, I have no idea if it’s reliable or consistent).

On my 29, with the ‘same’ tyres (ie 29 version) I found I could drop a bit.

My rules of thumb:
* drop the back until it feels squirmy then put a bit more in until it doesn’t
* drop the front until when you ride at a curb with a bit of speed you’re nearly feeling the curb ding the rim. Add a bit.

As well as my track pump I have a pressure meter that came with a tube once. Since it never agrees with the pump I disregard them both and do it by feel.

chiefgrooveguru – Member
Twice your weight in stone, minus one for the front and plus two for the rear, is a decent starting point for tubeless tyres in general. Bigger tyres lower, smaller tyres higher, rockier higher, slippier lower, smoother rider lower, more aggro rider higher, etc.

What about if it’s rocky & slippy 😥 😆

What about if it’s rocky & slippy

Bigger tyres and/or stickier compound! 💡

Twice your weight in stone, minus one for the front and plus two for the rear, is a decent starting point for tubeless tyres in general

If you ride like a pansy and/or don’t mind if your rims only last 5 minutes!

Even with BIG 2.2″ tyres I have to run minimum 30psi front, 35psi rear (and at less than 12 stone according to Stans I should be running 23/26!) otherwise I’ll roll the tyre off the rim, or bend the rim constantly. That’s on 26mm wide rims too. You can get away with lower pressures if you’re running say 35mm or wider rims cos of the extra volume they give.

I run 28ish front, 32ish rear on my 29er, slightly higher on the rear if it’s bone dry. Same as I ran my 26er at.

It depends what air I’m using. Air at some trail centres feels harder than others at the same pressure.

I’d never thought of this before.
I normally blow my tyres up at home, where I’ve got trees overhanging my house.
It’s a well known fact that woodland air is softer than city air, maybe that’s why I need more pressure than everyone else.

Try it. I guarantee it will take your riding to the next level.

Provided you fitted the correct tyres in the first place of course…

If you ride like a pansy and/or don’t mind if your rims only last 5 minutes!

Anyone who knows me will confirm that although I’m not absolute max gnarr I’m far from pansying along the trails. And I’ve never dinged my Flow rims. Maybe both my gauges are wrong but they agree with each other. Maybe your gauges are over-reading? Or maybe you ride like a talentless oaf with absolutely no sense of flow?

40psi front and rear (Conti X-King 2.2) with a 95kg rider

http://www.schwalbetires.com/tech_info/inflation_pressure

http://www.conti-tyres.co.uk/conticycle/ti%20travel%20contact.shtml

http://www.michelin.co.uk/bicycle/learn-share/bicycle-guide/bicycle-pressure-curves

http://www.michelinbicycletire.com/michelinbicycle/index.cfm?event=airpressuremtb.view