Sealant leaking from tubeless

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londoncommuter0000
Posts: 207
Joined: 18 Jul 2018, 10:36am

Sealant leaking from tubeless

Postby londoncommuter0000 » 28 Jan 2019, 12:46pm

Just had a call with the LBS who're putting tubeless onto my Surly. He says that the sealant is leaking out from between the tyre and the rim, and that as such, there's no way the bike is rideable.

Anyone got an idea as to why this is happening? Even LBS guy is stumped.
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Scunnered
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Joined: 11 Apr 2014, 11:23am

Re: Sealant leaking from tubeless

Postby Scunnered » 28 Jan 2019, 4:04pm

I would guess that the tyre bead has not seated tightly on the rim shoulder, either because there is a gap (which can be filled with additional rim tape), or because there is already too much rim tape.
A well seated tyre will give several loud pops as it is inflated and the tyre bead seats on the shoulder.

londoncommuter0000
Posts: 207
Joined: 18 Jul 2018, 10:36am

Re: Sealant leaking from tubeless

Postby londoncommuter0000 » 28 Jan 2019, 4:35pm

Scunnered wrote:I would guess that the tyre bead has not seated tightly on the rim shoulder, either because there is a gap (which can be filled with additional rim tape), or because there is already too much rim tape.
A well seated tyre will give several loud pops as it is inflated and the tyre bead seats on the shoulder.


Tyre definitely 'popped'. We're going to try a change of sealant. If that doesn't work, I might need to look at whether the rims and/or tyres are damaged in some way.
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mnichols
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Joined: 22 Apr 2013, 4:29pm

Re: Sealant leaking from tubeless

Postby mnichols » 28 Jan 2019, 9:07pm

I've been told that rims can get bent if you use tyre levers, not so much of an issue with inner tubes but an issue with tubeless

Brucey
Posts: 35553
Joined: 4 Jan 2012, 6:25pm

Re: Sealant leaking from tubeless

Postby Brucey » 28 Jan 2019, 9:23pm

if the tyres have been on and off the rims a few times then there is a pretty fair chance that the sealing lip on the tyre is damaged, or the rim tape is damaged. Sealants vary, so trying a different sealant may work.

cheers

Brucey
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~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~

londoncommuter0000
Posts: 207
Joined: 18 Jul 2018, 10:36am

Re: Sealant leaking from tubeless

Postby londoncommuter0000 » 28 Jan 2019, 9:24pm

Brucey wrote:if the tyres have been on and off the rims a few times then there is a pretty fair chance that the sealing lip on the tyre is damaged, or the rim tape is damaged. Sealants vary, so trying a different sealant may work.


No, brand new rims, brand new tyres.
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Samuel D
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Location: Paris

Re: Sealant leaking from tubeless

Postby Samuel D » 28 Jan 2019, 10:43pm

Since road tubeless is a jungle in terms of standards, not all combinations of tyre, sealant, rim, and rim tape can be made to work reliably. You might have to change something, hopefully one of the cheaper components.

londoncommuter0000
Posts: 207
Joined: 18 Jul 2018, 10:36am

Re: Sealant leaking from tubeless

Postby londoncommuter0000 » 17 Feb 2019, 11:53am

The bike is still in my local bike shop. The techie has now tried three different sealants. It has (so far) cost me £320 in parts and labour.

And I'm pretty sure that it's not over, since tubeless should hold pressure even without sealant, yes?

Right now, I'm of a mind to ask him just to rebuild my old wheels, and I'll punt the rims and tyres on ebay. But to get the spokes from my old rims onto the tubeless, he had to cut the spokes. So asking him to rebuild would mean buying new spokes.

Switching to tubeless on my bike is without a doubt the most expensive mistake I've ever made for any of my bikes.
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SimonCelsa
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Re: Sealant leaking from tubeless

Postby SimonCelsa » 17 Feb 2019, 12:31pm

£320!!!!! Jesus wept.......

That would annoy me but I'm a bit frugal and like the status quo if it ain't too much hassle!! What's a few punctures every now & then. I can't grasp this tubeless malarky.

Hope it resolves itself cheaply, all the best, Simon the dinosaur!!

Brucey
Posts: 35553
Joined: 4 Jan 2012, 6:25pm

Re: Sealant leaking from tubeless

Postby Brucey » 17 Feb 2019, 12:39pm

please tell us which rims and tyres you have used; it might avoid someone else making a similar mistake.

Where does your combination fall on this chart?

Image

cheers
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~~~~~~~~~~~~~~~~~~~~~~Brucey~~~~~~~~~~~~~~~~~~~~~~~~

reohn2
Posts: 35859
Joined: 26 Jun 2009, 8:21pm

Re: Sealant leaking from tubeless

Postby reohn2 » 17 Feb 2019, 12:40pm

londoncommuter0000 wrote:The bike is still in my local bike shop. The techie has now tried three different sealants. It has (so far) cost me £320 in parts and labour.

And I'm pretty sure that it's not over, since tubeless should hold pressure even without sealant, yes?

Right now, I'm of a mind to ask him just to rebuild my old wheels, and I'll punt the rims and tyres on ebay. But to get the spokes from my old rims onto the tubeless, he had to cut the spokes. So asking him to rebuild would mean buying new spokes.

Switching to tubeless on my bike is without a doubt the most expensive mistake I've ever made for any of my bikes.

I'd sell the tubless wheels on Ebay and buy a new pair of handbuilt wheels from Spa Cycles and go back to tubes.
As you say a very expensive endevour into tubless world
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I cycle therefore I am.

londoncommuter0000
Posts: 207
Joined: 18 Jul 2018, 10:36am

Re: Sealant leaking from tubeless

Postby londoncommuter0000 » 17 Feb 2019, 12:53pm

SimonCelsa wrote:£320!!!!! Jesus wept.......

That would annoy me but I'm a bit frugal and like the status quo if it ain't too much hassle!! What's a few punctures every now & then. I can't grasp this tubeless malarky.

Hope it resolves itself cheaply, all the best, Simon the dinosaur!!


We're what I'd call 'reasonably comfortable', so we're not going to be going hungry because of this, but it's still bleedin' annoying. I think what I'm going to do is follow the suggestion of just buying myself a new set or wheels from Spa Cycles, and call it quits. Ebay here I come.
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londoncommuter0000
Posts: 207
Joined: 18 Jul 2018, 10:36am

Re: Sealant leaking from tubeless

Postby londoncommuter0000 » 17 Feb 2019, 12:54pm

Brucey wrote:please tell us which rims and tyres you have used; it might avoid someone else making a similar mistake.

Where does your combination fall on this chart?

Image


I can't answer that, mate. I'm not techie enough. I'll ask the bloke from the shop.
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Brucey
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Joined: 4 Jan 2012, 6:25pm

Re: Sealant leaking from tubeless

Postby Brucey » 17 Feb 2019, 1:05pm

you do know the make and model of the rims and tyres though?

cheers
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