Tubeless, air leaking out of rim

Just curious but what pressure are you planning to ride at?

Around 3.6-4.0 bar

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Did you put an extra layer/one more layer than what you were previously/originally trying?
I go up to 11 bar when seating tyres.

I tried both 1 and 2 layers. I put in sealant and the tyre maintained pressure for 24h. I don’t dare to go to 11 bar anymore now that I have noticed the deformity that starts form at higher pressures.

Well then you sorted?

Not going to tell you what to do, what I have done I will. Across 9,5 wheelsets (19 wheels) for 3 bikes, I have used 1 - 3 layers of tape across the different rims. I don’t question why some only take one layer and others 3 layers, but I do want to get my popping/bead seating sounds.

I have used the Topeak JoeBlow booster pump since 2019 and have never had a failure when using the max 11 bar pressure to mount a tubeless tyre. And that’s across carbon and alu rims too.

Each to their own. :metal:t3:

Think there is a difference between using a high-pressure blast into an unseated (not fully seated) tyre, and pumping a seated tyre up to that pressure. When the tyre isn’t seated, the air blast expands very quickly, dropping in pressure. You’re not actually pressurising the rim as you’d do with a seated tyre.

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all rims have a max pressure, the wider the rim the lower the max in most cases. My 23 mm carbon rims have a max of 7.5 bar 110 psi, Also keep in mind that wider tires and hookless rims have lower max. For example a 25mm hookless gravel rim has a max of 4,5 bar

I really think you will damage the rim and or tire when you inflate for example a 32mm tire on a 23mm hookless rim over 6 bar. (a lot of variables in play here, tire and rim width, hooked/hookless)

11 bar is crazy high these days :face_with_peeking_eye:

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This is very worrying to me. I’d be stripping the tyre/tape off and very carefully examining the rim bed before riding it. It the side is moving in that’s probably because the bead is moving out due to something…it might just be the pressure of the tyre but generally if it’s moving it’s because something’s wrong…

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@russell.r.sage warned me too, so I carefully checked for damage but I didn’t see any obvious damage or cracks

Glad I’m not the only one who questioned the 9 bar [130 psi]. May be ok with the right rim & tire combo, but that would seem excessive for most of the tubeless compatible stuff I have seen these days. Flex at the wheel would seem rather like if the max is around 5.5 bar [80 psi] or less I tend to see.

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Yeah, share the same sentiments as you. My reference is to seating a bead/mounting a tubeless tyre. Not using 11 bar in a fully seated tyre/already mounted airtight tyre. :person_shrugging:t3:

Not sure what you are trying to highlight to me with your comment.

Not aimed at you, but just trying to prevent disaster. :slight_smile: The OP pumped the seated tyre up to 9 bar. Then you mention using 11 bar…

That’s brave of the OP. I read it that he had only gone up to 9 bar when trying to seat the tyre.
I would hope no one would want to go up to 11 bar for a seated tyre. If so, may they not reproduce.

To be clear, I have used 11 bar to mount tyres with no problem over the past 5 years. And I doubt my previous responses stoked the idea of trying 11 bar in an already mounted tyre.

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I’ve never had to go anywhere near 130psi to mount a tubeless tyre and wouldn’t recommend it.

The maximum pressure the wheel can withstand is the same at any time - not just when in use.

I am fairly comfortable slightly exceeding the max tyre pressure during the install of a tyre to get the bead to seat - but only by 10% or so.

And I’m talking about the pressure inside the tyre - not the the device used to inflate - 800psi CO2 cartridges are a godsend :slight_smile:

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You can just visually see if the tire is seated correctly, if not @ 5-6 bar, try other stuff, like soapy water to improve the tire gliding into place etc instead of more pressure.
But besides the pressure discussion, you will certainly need sealant in some tires… before they can hold air… it depends very much on the tire… I have had MTB tires hold pressure over night without sealant (new tires, new wheels, new tape). And new wheels and road tires, that didn’t hold pressure for a minute… (not a tape issue, because the rims had no spokehols on the inside :slight_smile: ). Some tires just need to soak up sealant before they hold air.

But if you are 100% sure it’s leaking out of the rim… redo you tape first. Maybe get the tape tightly in place overnight with an inner tube

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I would not ride these ever again.

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