Tubeless tyre - fail

uad782
Posts: 315
Joined: Sun Aug 02, 2015 5:51 pm
Location: Somewhere near Malabugilmah

Tubeless tyre - fail

Postby uad782 » Tue Apr 03, 2018 7:07 pm

Hi Everyone,

Went riding today in the bush. Climbing a hill I heard air escaping from my rear tyre, a 2 month old Vittoria Tubeless Mezcal. I could see a plume of pink (orange seal - added in on Good Friday) sealant shooting into the air. The hole appears to be on the centre ridge of the tyre. I suspect it was caused by a small sharp rock.

I kept riding for a while (15 min) as I hoped it may seal. Alas it didn't so all I could do was put a tube in the tyre. Before placing the tube I did put the hole at the bottom so the sealant would cover it but as soon as I started riding again air escaped along with the geyser of pink.

I will do an autopsy on the tyre tomorrow but I think the hole was very small so why did it not seal?

Should I have waited longer and put the hole at the bottom longer?

Is the rather new tyre recoverable as tubeless or am I stuck with a tube now?

I thought tubeless was better than this.

Any comments appreciated.

User avatar
Duck!
Expert
Posts: 7028
Joined: Tue May 21, 2013 8:21 pm
Location: On The Tools

Re: Tubeless tyre - fail

Postby Duck! » Tue Apr 03, 2018 7:30 pm

Tubeless isn't puncture-proof, and a big enough hole will not seal. There are solutions, with patches and plugs available, but there are some holes that even these will not properly fix. No different to tubed tyres in that regard.
I had a thought, but it got run over as it crossed my mind.

uad782
Posts: 315
Joined: Sun Aug 02, 2015 5:51 pm
Location: Somewhere near Malabugilmah

Re: Tubeless tyre - fail

Postby uad782 » Tue Apr 03, 2018 7:56 pm

Thanks Duck,

So I am destined to run a tube now unless I spoil my newish tyre?

User avatar
Duck!
Expert
Posts: 7028
Joined: Tue May 21, 2013 8:21 pm
Location: On The Tools

Re: Tubeless tyre - fail

Postby Duck! » Tue Apr 03, 2018 8:05 pm

If the hole isn't too bad a plug should do the trick and restore its tubelessness.
I had a thought, but it got run over as it crossed my mind.

uad782
Posts: 315
Joined: Sun Aug 02, 2015 5:51 pm
Location: Somewhere near Malabugilmah

Re: Tubeless tyre - fail

Postby uad782 » Tue Apr 03, 2018 8:13 pm

Thanks I have a Dynaplug which I will try.

User avatar
Cardy George
Posts: 586
Joined: Sun Aug 23, 2009 11:10 pm
Location: Red Cliffs, Vic

Re: Tubeless tyre - fail

Postby Cardy George » Wed Apr 04, 2018 6:52 am

Do the plugs need glue or do you shove them in and let the sealant do the work?

owly
Posts: 125
Joined: Thu Oct 20, 2016 9:11 am
Location: Inglewood

Re: Tubeless tyre - fail

Postby owly » Wed Apr 04, 2018 10:12 am

Shove a plug or two in (if you need two), then let the sealant do its thing for a bit, with the hole facing the bottom.
MUFC :twisted:

User avatar
Duck!
Expert
Posts: 7028
Joined: Tue May 21, 2013 8:21 pm
Location: On The Tools

Re: Tubeless tyre - fail

Postby Duck! » Wed Apr 04, 2018 10:22 am

The plugs I've used are glued in.
I had a thought, but it got run over as it crossed my mind.

User avatar
Cardy George
Posts: 586
Joined: Sun Aug 23, 2009 11:10 pm
Location: Red Cliffs, Vic

Re: Tubeless tyre - fail

Postby Cardy George » Wed Apr 04, 2018 5:26 pm

Does the sealant stop the glue from setting like it does with a tube patch?

I'm twenty days away from a real MTB with real tubeless wheels and planning an epic first weekend.....

User avatar
Duck!
Expert
Posts: 7028
Joined: Tue May 21, 2013 8:21 pm
Location: On The Tools

Re: Tubeless tyre - fail

Postby Duck! » Wed Apr 04, 2018 9:31 pm

The glue with the plugs I've used doesn't seem to have been affected by the sealant, although there was one where I had to have a second go at plugging the hole to get it to seal. I can't recall what I did that didn't work the first time. I suspect, but can't be absolutely certain, that for best results with plugs, you need to rotate the wheel so the hole is naer the top, and allow the sealant to run away from it. With minimal liquid sealant in the immediate area, the solvent in the glue can evaporate properly and bond the plug to the tyre.

The real key is allowing a few minutes for the chemical reactions to do their thing. If you try to rush the process and pump too much air in before things are properly bonded, you'll have leaks. No different to patching a tube really.
I had a thought, but it got run over as it crossed my mind.

uad782
Posts: 315
Joined: Sun Aug 02, 2015 5:51 pm
Location: Somewhere near Malabugilmah

Re: Tubeless tyre - fail

Postby uad782 » Wed Apr 04, 2018 10:26 pm

Well I went for the cheap option. I found the small hole and on the inside of the tyre I covered it with the vulcanising glue for inner tubes. I let it set and put a patch on it. A couple of hours later I put in the sealant and pumped her up.

So far, so good. I have it standing with the patch at the bottom hopefully bathing in sealant.

There seemed to be lots of videos and posts recommending this as a way to fix a hole in a tubeless tyre.

Ducks way or the use of a dynaplug means you don,t need to remove the tyre, which is better. I see there are some cheap tubeless kits such as a “side of bacon”. They all seem to push some form of rubber in the hole and let the sealant work it’s magic. Only a few kits seem to sell some glue as well. Is the glue really necessary?

User avatar
RonK
Posts: 10306
Joined: Mon Aug 24, 2009 2:08 pm
Location: If you need to know, ask me
Contact:

Re: Tubeless tyre - fail

Postby RonK » Thu Apr 05, 2018 8:27 am

Cardy George wrote:Does the sealant stop the glue from setting like it does with a tube patch?

I'm twenty days away from a real MTB with real tubeless wheels and planning an epic first weekend.....

If you are buying a new MTB I doubt it will be set up tubeless, even if it comes with tubeless ready rims and tyres.
Cycle touring blog and tour journals: whispering wheels...

User avatar
Cardy George
Posts: 586
Joined: Sun Aug 23, 2009 11:10 pm
Location: Red Cliffs, Vic

Re: Tubeless tyre - fail

Postby Cardy George » Thu Apr 05, 2018 11:32 am

RonK wrote:
Cardy George wrote:Does the sealant stop the glue from setting like it does with a tube patch?

I'm twenty days away from a real MTB with real tubeless wheels and planning an epic first weekend.....

If you are buying a new MTB I doubt it will be set up tubeless, even if it comes with tubeless ready rims and tyres.

While you make a good point, it's not your average MTB and the shop and I have made the necessary arrangements :D

Who is online

Users browsing this forum: No registered users