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So as the bike shop set my tubeless tyres up on my 24.5mm inner rims. The pressures are high and am wanting to reduce to correct as poss pressures for tomorrow’s ride.
It can be said on this topic at least that I’m a heavy lad so with all this in mind what kinda pressures are we all using as I’m relatively new to tubeless (revelation it has been).
I’m thinking 27 psi front & 29 psi rear for mainly road tomoz as the need to bed in brakes is a priority before hurtling offroad downwards.
thanks guys 🙂
I've always gone with the Stans formula of weight in stone x 2 then plus two for the rear, -1 for the front. So 13 stone gives 26, meaning 28psi rear, 25psi front.
Ahh yes that olde formula I was looking for the other day. Thanks bud. I shall give that a whirl and go on feel there after.
However that method means a jaw dropping amount of pressure for me 🤣
The other method is of course to pump them up. If you ping off stuff then let some air out. If you squirm around a lot and/or hit your rims then add more air.
I like that formula, sounds about right.. - I've always just gone for just under 30psi, feels fine unless tyres have softer sidewalls. I really hate squirmy tyres on corners, so mine are usually a bit firmer than most.
22 rear 20 up front for me. 25mm rims. 2.35 maxxis high roller front and Minion rear.
Really depends on your weight type of riding and most importantly tyres
For the first ride keep them higher as the first ride usually gets the sealant to block any porous sidewalls especially on scwalbe and conti tyres .
My pressures are pretty much the same as Whitesones (but the weight thing is different... 🤢).
run them as low as you dare I say...
21 front 23 rear for me. Havent pinged a rim...... yet
Cheers guys for all advice. Will get the digi pressure gauge on tomoz and go from there.
Will bear in mind the sealant and pourous sidewalls thang.
I’ll probs run 28 f & 30 r but it’s all speculative till I check them.
👍
I've found the harder the tyre pressure the safer the rim. My friends run low 20s and are always dinging the rim. I run about 30, they all say I'm old school but I don't find it bounces, my rims are still round and I don't get flats. It works for me.
I'm sure you will find your own sweet spot, just keep messing with it.
I go 28-25 but I have no idea if those are the actual pressures, just what it says on my track pump. Experiment a bit and find out what works.
My front is 29 and I have found that at 25 it bounces all over and at 16 the tyre folds when cornering. So I need to find somewhere in between.
The other method is of course to pump them up. If you ping off stuff then let some air out. If you squirm around a lot and/or hit your rims then add more air.
Works for me.
Bought a pressure device recently and it turns out I'm low 20s, sometimes under 20psi on the front (2.5in on 30mm rim).
I am running a Magic Mary 2.35 in Soft and normal exo casing at 20PSI in the front and the new Hans Dampf 2.35 in the rear in super gravity casing at around 27ish PSI both on 29mm internal width rims.
These are mounted on my 29 Specialized Enduro and I do charge things quite hard and dont have any issues with rim strikes. I do however run my front fork quite soft so this maybe helps me get away with lower PSI in the front. If I go somewhere rocky, each gets maybe 2 extra PSI, if I am riding somewhere sloppy/slippy prob 2PSI out of each for grip.
Racing Ralphs Evos on my rigid 29er here. Schwalble have really nice supportive sidewalls so I run 25 front and rear at 88kg without pedalling bounce. I had to run Specialized Butcher/Purgatory at 35 to stop the pedalling bounce.
Firstly the gauges on pumps and even seperate ones are probably not very accurate. But they are probably quote repeatable (putting aside the resolution of track pump gauges that go to 200psi)
ie 25psi on the gauge is likely to be the same pressure in the tyre time after time.
I would set the tyre using the stans equation, then adjust accordingly until it feels right.
At about 100kg I run 25 in the back and 20 in the front give or take. 25-30mm internal rims, 2.3-2.5 wide tyres. All Maxxis Tubeless ready exo casings (ie not DH casing).