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 Post subject: Re: Tubular Repair
PostPosted: Sat Jul 25, 2015 6:10 am 
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Joined: Sun Oct 07, 2012 2:39 am
Posts: 1017
Location: Blacksburg, VA
I have a pair of once-used Challenge CX tubs. Like, warmed up on road tires, did a couple of laps, raced for 45min. The tread is coming off in a couple of places.

Anyone have a good recommendation for what I can use to re-glue the tread? As it's a CX tub, I'd like it to be soft and supple still.


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 Post subject: Re: Tubular Repair
Posted: Sat Jul 25, 2015 6:10 am 


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 Post subject: Re: Tubular Repair
PostPosted: Sat Jul 25, 2015 11:10 am 
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Joined: Fri Dec 24, 2010 9:37 pm
Posts: 1360
Location: it's raining, it must be uk
there's an article about fixing tread here...

https://www.bikeman.com/bicycle-repair- ... ead-repair


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 Post subject: Re: Tubular Repair
PostPosted: Sat Oct 10, 2015 8:08 pm 
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Joined: Fri May 22, 2009 5:00 pm
Posts: 60
Got a quick question for you.
I dug out a flat tub , Vittoria Pave 25c, to have a look at either sending it to tire alert - not an option as postage is too expensive- or fixing.

I pumped it up a little and found where the air was coming out.
When I looked closer it turns out the tyre casing is torn just outside the basetape and I can see the tube.
There was less then 200 km on the tub.
Where the outer casing is torn would be still on the glue on the rim.

Is this for the bin? Or is it worth trying to fix?
TIA


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 Post subject: Re: Tubular Repair
PostPosted: Sun Oct 11, 2015 12:15 pm 
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Joined: Fri Dec 24, 2010 9:37 pm
Posts: 1360
Location: it's raining, it must be uk
depends how big the cut/tear is

with veloflex i patch it with a piece of carcass from an old tyre, about 15-20mm (cut it oval shape)

glue it to the inside with barge cement (or another durable contact adhesive), finish the rest of the repair and sew up, before gluing the basetape, put tyre on a rim and inflate to max pressure, if there's no sign of a bulge it's fine

i've done this for cuts c. 5mm with no problem


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 Post subject: Re: Tubular Repair
PostPosted: Sun Oct 11, 2015 3:34 pm 
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Joined: Fri May 22, 2009 5:00 pm
Posts: 60
Thanks.
Ah it wouldnt be bigger then 5mm.
Better gets some waxed dental floss etc.
Have a few old tyres that can be sacrifriced for a patch.


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 Post subject: Re: Tubular Repair
PostPosted: Sun Oct 11, 2015 4:11 pm 
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Joined: Fri Dec 24, 2010 9:37 pm
Posts: 1360
Location: it's raining, it must be uk
fwiw i use dacron line for sewing them, 20lb - 30lb rated, you can get a reel for a few quid/dollars/euros

it's sold as 'backing line' by angling equipment suppliers, available in bright colours, which helps old eyes see where the stitches are!


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 Post subject: Re: Tubular Repair
PostPosted: Fri Nov 20, 2015 11:29 pm 
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Joined: Fri Nov 20, 2015 11:04 pm
Posts: 13
Does anybody have a link to youtube vid showing how to repair a tubular tire? About to transition for the first time, and wanted to be prepared when a flat does happen.


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 Post subject: Re: Tubular Repair
PostPosted: Sat Nov 21, 2015 2:45 am 
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Tubbie Guru

Joined: Tue May 03, 2005 2:20 am
Posts: 5851
Location: Belgium
Hi,

No idea about youtube other than a lot of non sense but basically you want to use a X type of sewing.
All of which is explained already in this thread.

Cheers, ;)

_________________
Being a snob is an expensive hobby.


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 Post subject: Re: Tubular Repair
PostPosted: Sun Jan 03, 2016 10:02 pm 
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in the industry

Joined: Sat May 12, 2012 7:25 pm
Posts: 3260
Location: Glermsford, Suffolk U.K
What do you guys use to fill ghe cut in the carcass. Would wet suit repair glue work well or is there better.

_________________
www.thecycleclinic.co.uk


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 Post subject: Re: Tubular Repair
PostPosted: Sun Jan 03, 2016 10:39 pm 
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Tubbie Guru

Joined: Tue May 03, 2005 2:20 am
Posts: 5851
Location: Belgium
Hi,

[quote][/Would wet suit repair glue work well or is there better.quote]

Should work as it contains polyurethane. In general I can't be bothered with these small cuts though.
The ones on the sides of the envelope are the ones I worry about but there's much you can do about those anyhow short of coating them with liquid latex on a regular basis.

Cheers, ;)

_________________
Being a snob is an expensive hobby.


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 Post subject: Re: Tubular Repair
PostPosted: Tue May 24, 2016 10:44 am 
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Joined: Mon Aug 31, 2015 8:42 pm
Posts: 126
Location: Madrid, España
Tried my fist tube repair on a continental sprinter and this morning at 7 am the tyre blew up and it woke me up.
It seemed like a simple job but I guess I made a mistake some where.
Next time I won't glue until I live it out with air for at least 1 day on the tyre stretching.


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 Post subject: Re: Tubular Repair
PostPosted: Wed May 25, 2016 9:20 am 
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Joined: Wed Apr 25, 2007 10:23 am
Posts: 1275
Location: Pack filler
fabriciom wrote:
Tried my fist tube repair on a continental sprinter and this morning at 7 am the tyre blew up and it woke me up.
It seemed like a simple job but I guess I made a mistake some where.
Next time I won't glue until I live it out with air for at least 1 day on the tyre stretching.


The good thing about conti tubs is, they're strong enough, and easy enough to repair.

Pull it to bits and have another go. Either you didn't repair the puncture itself well enough, or sounds more likely that your sewing wasn't tight enough, and allowed the inner tube to poke through like a hernia.

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 Post subject: Re: Tubular Repair
PostPosted: Sat May 28, 2016 2:30 pm 
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Joined: Mon Aug 31, 2015 8:42 pm
Posts: 126
Location: Madrid, España
I think it was the string I used wasn't strong enough.

The inner tube is destroyed not way to repair.


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 Post subject: Re: Tubular Repair
PostPosted: Sat May 28, 2016 6:15 pm 
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Joined: Fri Dec 24, 2010 9:37 pm
Posts: 1360
Location: it's raining, it must be uk
you can replace the inner tube with a new (latex) one, there's some info in this thread, also outside ww...

http://www.sheldonbrown.com/brandt/tubular-repair.html
http://www.bikeforums.net/classic-vinta ... ement.html


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 Post subject: Re: Tubular Repair
Posted: Sat May 28, 2016 6:15 pm 


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 Post subject: Re: Tubular Repair
PostPosted: Sat May 28, 2016 11:02 pm 
Offline
Tubbie Guru

Joined: Tue May 03, 2005 2:20 am
Posts: 5851
Location: Belgium
Hi,

fabriciom wrote:
I think it was the string I used wasn't strong enough.

The inner tube is destroyed not way to repair.


I suggest using high quality dental floss a la Johnson & Johnson which can be found at the local pharmacy in most European and American countries.
Bottom line, strong, silk, waxed and no stretching.

Anything else is mostly down to sewing practice.

Cheers, ;)

_________________
Being a snob is an expensive hobby.


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