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Tyre tart having trouble ...

23 posts & 16 voices | Started 2 years ago by cinnamon_girl | Latest reply from cinnamon_girl

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cinnamon_girl - Member

My patience is running out!

Briefly, am changing from tubeless back to tubes (don't ask about C_G logic). Have removed rim strip and replaced with insulating tape, as recommended on here, cos it's a stubborn DT Swiss 4.2 rim.

Put on the tyre (Maxxis Medusa that had been used tubeless) and it deflates despite having checked tube first. Remove said tube and use another tube. Same thing has happened.

But the Medusa does not say it is specifically a UST tyre so assume it can do both. Can't find info on their website either.

Over to the STW Massiv cos they're bound to know. Thank you lovely people

A very fed-up C_G

Posted 2 years ago #
rOcKeTdOg - Member

checked medusa for thorns not noticed because it was tubeless?

Posted 2 years ago #
joolsburger - Member

Yup that's what i'd say something's stuck in your tyre.

Posted 2 years ago #
cinnamon_girl - Member

It flatted when tubeless due to a rather large thorn! Found another Medusa in the garage and has been triple-checked by my fair hands.

If a tyre is specifically UST, can tubes not be used?

Posted 2 years ago #
rOcKeTdOg - Member

inflate the removed tubes, check for leaks, then you can definately rule out thorns etc

Posted 2 years ago #
cinnamon_girl - Member

Yep, inflated tubes, put in water, no bubbles. I don't understand what is going on!

Posted 2 years ago #
vim_fuego - Member

it's got to be coming out somewhere.
Reinflate as you had in the wheel, put wheel in water, maybe valve base torn.

Posted 2 years ago #
angryratio - Member

valve core/s ?

Posted 2 years ago #
cinnamon_girl - Member

If it is a UST tyre, will it make any difference with a tube inside? Sorry but don't understand what the difference is between UST and non-UST

I'm just getting cross now, perhaps I will leave it til tomorrow once I've checked the valve.

Aaaarrrggghhh!

Thanks for replies.

Posted 2 years ago #
crispy bacon - Member

I run a Bonti tubeless ready tyre with an inner tube with no problems - well other than it's a ba**ard to get on the rim

You should be OK using tubes once you find out why it keeps going down.

Not wishing to teach C-G to suck eggs but have you run your fair hand round the tyre both ways? sometimes I find that I only locate the thorn etc running my hand both ways, could be worth a punt if you haven't already done so.

Posted 2 years ago #
dobo - Member

tubes work in all tyres ust or not

sounds like you are either pinching the tube when you put the tyre on or have a thorn in it somewhere or your valves are faulty or you are faulty

Posted 2 years ago #
b r - Member

You can use a tube in a UST, its not a problem, just a rather heavy way of going about it.

A UST tyre has an airtight membrane and a different bead.

Posted 2 years ago #
buzz-lightyear - Member

Right

I suspect you have a tiny thorn in the tyre - so small you've missed it. These buggers can create minute holes in tubes that then take hours to deflate.
I have 3 punctured tubes awaiting more detailed examiniation to find these micro holes, thanks to a tiny tiny thorn in my slick tyres.

Posted 2 years ago #
cinnamon_girl - Member

Well, it's 2 Medusa tyres that this has been happening with which is why I was asking about how UST are different to tubed tyres. One of the tyres has fitted a Flataway kevlar tyre liner which means that normally only large thorns can penetrate.

I do accept that my recent riding has seen a lot of thorns as another bike has a flat rear tyre which isn't tubeless. Am also thinking that my garage floor needs to be swept in case anything is being picked up there.

Thanks very much for suggestions though, certainly appreciated.

Posted 2 years ago #
DeeJay - Member

valve core/s ?

I bought some new tubes recently without realising they had removeable valve cores - tyre kept going down overnight until it dawned on me that the core was loose and just needed nipping up - even then it was flat again halfway through Sundays ride

Posted 2 years ago #
woody2000 - Member

Take some bog roll and lightly run it round the inside of the tyre - if there's a little something sticking through the carcass the bog roll will stick to it.

Posted 2 years ago #
dropoff - Member

Is the tyre bead sealing onto the rim as you pump up the tube, then the tube will compress the air caught between it and the tyre but will leak out slowly and seem like a puncture. Try reinflating the tube and see if it happens again.

Posted 2 years ago #
kevonakona - Member

As Dropoff, could be air trapped in ust and giving appearance of pressure in tube, then deflating tubeless part of set up as there's no gunk left. We had one go on a ride everyone heard the deflation but the tube was sound.

Posted 2 years ago #
PeterPoddy - Member

Do I have to come round and fix it again?

Or do you want to bring your wheels round here?

You know it's the quickest option in the long run.

Posted 2 years ago #
barca2 - Member

Again, it's probably sucking eggs time again but if you line up the logo on the tyre with the valve, when it punctures and you take the tube out, find the hole in the tube and violia, you can pinpoint EXCACTLY where on the tyre the problem is.

Posted 2 years ago #
boobs - Member

I have had a tyre that kept on failing on a ride and could find nothing inside. In the end I found it was a small flint on the outside that poked through occasionally when inflated and being used. So check the outside too.

Posted 2 years ago #
cinnamon_girl - Member

Another learning curve this morning.

Checked carefully both inner tubes by hand and found tiny wee thorns so that would explain the very slow punctures. Fingers crossed this now gets sorted.

Mr Poddy - thank you very much for kind offer anyway!

Posted 2 years ago #
cinnamon_girl - Member

Edit - I always thought this business of lining up logo's was a joke! I can see the point now.

Posted 2 years ago #

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