Tubeless De-Rimming: How to Fix On Trail

[Shepherd]

Hi Everyone,

 

Hope you can shed some light on this for me.

 

I recently converted to Tubeless on my 2014 Specialized Stumpjumper Comp (Carbon) which is all stock standard.

 

However over the weekend was riding with a group and someones tubeless tired had burped when she hit a big water pipe in the sugar cane which fully deflated her tired and the bead came off the side wall.

 

I wasn't there at first but they tried to bomb it and inflate tire but could not reseal it to the rim and was forced to put a tube in.

 

Is there a special tricks to when that happens to get it sealed back up or is the only way to put a tube in?

 

Kind Regards,

Tim

[Wil6]

If you are lucky you will be able to seal it again with a large volume CO2 bomb. It all depends on the tire and the rim. Some tires you will have no problem, but some Tubeless ready / tubeless tires you will need a compressor and a little bit of time and luck.

 

Easiest way is to put a tube in and ride to the closest checkpoint / bike shop to help you fit the tire again.

[rouxtjie]

Hi Everyone,

 

Hope you can shed some light on this for me.

 

I recently converted to Tubeless on my 2014 Specialized Stumpjumper Comp (Carbon) which is all stock standard.

 

However over the weekend was riding with a group and someones tubeless tired had burped when she hit a big water pipe in the sugar cane which fully deflated her tired and the bead came off the side wall.

 

I wasn't there at first but they tried to bomb it and inflate tire but could not reseal it to the rim and was forced to put a tube in.

 

Is there a special tricks to when that happens to get it sealed back up or is the only way to put a tube in?

 

Kind Regards,

Tim

if the burp only semi- deflated the tyre, you are ok....just pump up again

 

if the burp totally de-beaded the tyre and all air is lost you have a problem....

 

1.Remove wheel asap make sure burp didn't move bead over the valve

2.Get all available bombs...start with the biggest one you can get your hands on

3.Remove valve core from valve(keep this close by or ask someone to hold it)

4.Screw bomb into adapter and fit adapter over valve...make sure wheel is hanging on a branch...don't let it sit on the ground

5.Let all the co2 out by opening adapter as quickly and fast as possible.

6.Do until tyre seats or you only have one bomb left

7.If you manage to get it seated, screw in valve core without letting enough air out to deflate all the way...you need to be quick and precise with the core....once the core is in, use another bomb to top up to desired pressure

8.If you didn't manage to get it seated, use tjoob with last bomb

9.If you don't have a tjoob, find a nice tree and phone wife to fetch you.

10.Get home on your own steam or wife and re-do tubeless conversion from scratch on wheel even if you did manage to get it seated again

Edited January 14, 2014 by rouxtjie

[BarHugger]

Seems the tire was just to tired to inflate again to a full tyre.....

[feetup]

Hi Everyone,

 

Hope you can shed some light on this for me.

 

I recently converted to Tubeless on my 2014 Specialized Stumpjumper Comp (Carbon) which is all stock standard.

 

However over the weekend was riding with a group and someones tubeless tired had burped when she hit a big water pipe in the sugar cane which fully deflated her tired and the bead came off the side wall.

 

I wasn't there at first but they tried to bomb it and inflate tire but could not reseal it to the rim and was forced to put a tube in.

 

Is there a special tricks to when that happens to get it sealed back up or is the only way to put a tube in?

 

Kind Regards,

Tim

You will need to get some air in with a hand pump so as to hold on the walls.

Then use the bomb.

The bomb inflates too fast for the tyre and wall to amalgamate(spell check lol)

Edited January 14, 2014 by feetup

[Shepherd]

haha!!

 

 

Thanks guys... Just been reading some other tubeless threads...

 

Tubeless seems like a mission, glad my LBS did my first conversion for me, will need to learn though!!

 

Hope everyone has some good riding this week!!

 

Cheers

[Doggone]

Wondering if the process then 4x4 boys use with lighter fluid and a match might not do the trick.

 

I am not exactly a pyrotechnic genius and do not need to burn my house down to try the experiment , but there must be someone out there with a love for living dangerously..........

[BarHugger]

.....on a serious note:

 

Same procedure as mentioned previously, but make use of some nylon rope to compress the tire's centre section (midline) onto the rim surface. The rope is thus pushing the whole outer circumference of the tire against the rim. This pushes the sidewall and beading outwards while simultaneously decreasing the volume of air needed to inflate the tire. It should seat more easily and prevent you from using to many bombs. Once tire is seated, remove nylon rope and inflate to required pressure.

[Meentb]

You will need to get some air in with a hand pump so as to hold on the walls.

Then use the bomb.

The bomb inflates too fast for the tyre and wall to amalgamate(spell check lol)

 

Huh? So you use a hand pump after the bead has become un seated? Never ever really heard of that method

[ChUkKy]

You will need to get some air in with a hand pump so as to hold on the walls.

 

I will pay good money to see you do this with the unseated tyre on the trail.

[Doggone]

.....on a serious note:

 

Same procedure as mentioned previously, but make use of some nylon rope to compress the tire's centre section (midline) onto the rim surface. The rope is thus pushing the whole outer circumference of the tire against the rim. This pushes the sidewall and beading outwards while simultaneously decreasing the volume of air needed to inflate the tire. It should seat more easily and prevent you from using to many bombs. Once tire is seated, remove nylon rope and inflate to required pressure.

 

If you were out on the trail and did not have rope but had a tube, would it work to stretch the tube over the outside of the tyre and then bomb it? Just thinking that this might force the bead of the tyre into better contact with the rim.........?

[Li Mu Bai]

haha!!

 

 

Thanks guys... Just been reading some other tubeless threads...

 

Tubeless seems like a mission, glad my LBS did my first conversion for me, will need to learn though!!

 

Hope everyone has some good riding this week!!

 

Cheers

Your LBS is unfortunately not with you when riding in the boonies, so best advice is to get to know how it all works asap, and practice if you can.

[BarHugger]

If you were out on the trail and did not have rope but had a tube, would it work to stretch the tube over the outside of the tyre and then bomb it? Just thinking that this might force the bead of the tyre into better contact with the rim.........?

 

.....might also work, especially in your inflate the tube a little bit. Maybe a LBS must try it and inform the rest. I carry a piece of nylon rope (and duct/k tape) with....freakin amazing what you can do with it when needed.

[Bike Mob]

If your LBS did a crappy job of converting then you're still screwed. If you cannot inflate a tire in the garage with a floor pump there is very little chance that bombing it on the trail will sort you out.

 

Firstly dont just bomb the thing willy nilly... pinch the tire between tyour fingers and pull outwards toward the bead as hard as you can, work like this all the way around.

 

Then make sure the area directly either side of the valve is well seated and not held up around the valve in any way.

 

Place valve at 12 O'Clock and Bomb it, quickly assess where the leaking air is coming from and press that area flat to try force the area closer to the bead.

 

Only bomb twice, if its not holding air then it's not going to, put a tube in and hand pump it if you have a hand pump, saving bombs for any flats later.

 

Essential kit is the presta to Schrader adapter or see other thread on valve cap emergency converters - you should be able to then seat your tubeless tire or in case of a slow leak,bounce from one petrol station to the next refilling with compressed air as you go to get close to home.

[Hairy]

Wondering if the process then 4x4 boys use with lighter fluid and a match might not do the trick.

 

I am not exactly a pyrotechnic genius and do not need to burn my house down to try the experiment , but there must be someone out there with a love for living dangerously..........

Recon if you are using a rim tape of sorts it would / could melt using this method .... have considered it before I do confess!

[Shepherd]

.....might also work, especially in your inflate the tube a little bit. Maybe a LBS must try it and inform the rest. I carry a piece of nylon rope (and duct/k tape) with....freakin amazing what you can do with it when needed.

 

The rope idea is a very good one...!!

 

I don't really have room for a spare tube now on the bike and dont like to tape it to the bike...

 

 

A. its carbon and duck tape makes it look ugly.

B. if you don't use it in a long time the tube perishes anyways.

 

HOWEVER this being said doing a long race you will need to take a tube with to be prepared...

 

I am mainly doing the XCO provincial races, and then shorter 40-50km races...

 

I am also not running super low pressures, keeping it around 1.8 bar and is working good for me.