Glueing tubulars [the tubular thread]

Everything about building wheels, glueing tubs, etc.
deek
Posts: 406
Joined: Fri Aug 31, 2012 6:32 pm

by deek

Was it just the valve core that broke or the shaft of the valve? If it's just the valve core, then just steal another valve core off an old flat tube.

miskur505
Posts: 19
Joined: Tue Jun 26, 2012 5:13 am

by miskur505

Yes, it was just the valve core. So I just need to unscrew the valve from the stem. Unfortunately I don't have any other tubes with removable valve cores, so are there any cheap tubes I can buy just to cannibalize their cores, or can I find cores separately somewhere?

tmanley
Posts: 238
Joined: Tue Jul 25, 2006 5:53 pm
Location: San Jose, CA
Contact:

by tmanley

I'm looking for some general help regarding a recurring problem I've experienced over the past 3 years with Vittoria tubulars tires (Corsa CX on Enve 65's & Pave's on Ksyriums). Halfway through each season I've found that the base tape at the outer edges begins to loose its' adhesion to the rim and by the end of the season the only part of base tape secured to the rim in the very middle of the tire.

My hypothesis is that the seam on the tires is so pronounced that over time it causes the base tape to pull away from the rim. I don't have any other tubular brands to check this against, but in talking with my local shop that tried to glue my Ksyriums this season they gave up after the third try of trying to get the tire to glue correctly.

Have others run into this problem before? Are there other brands of tubulars that have a less pronounced spine under the base tape and perhaps will lie flatter?

-Thanks, Todd

User avatar
ksroadie
Posts: 218
Joined: Tue Apr 01, 2008 9:15 am
Location: Los Angeles

by ksroadie


Geoff
Posts: 5120
Joined: Sat Dec 13, 2003 2:25 am
Location: Canada

by Geoff

Your LBS will have presta cores. Fortunately, that is one of the things that has been standardized in that crazy industry.

Geoff
Posts: 5120
Joined: Sat Dec 13, 2003 2:25 am
Location: Canada

by Geoff

Nope. Never had that happen with a Vittoria. It happened all the time in my youth with Barum, though.

My first advice would be to glue your own tires exclusively. I hope that they aren't applying some solvent to the basetape or mixing something with the glue to get it to spread on the rim more easily. Back 'in the day', people used to add thinner into Clement Red so it would flow out of a squeeze bottle. Not a very good idea...

tmanley
Posts: 238
Joined: Tue Jul 25, 2006 5:53 pm
Location: San Jose, CA
Contact:

by tmanley

The glue technique used by myself and my shop aren't compromised by adding any solvent or other chemicals. I finally had the chance to check out a couple of other tubular tires and the Conti GP4000's had the smoothest and flat base tape of all of them. I'll probably give these a try and see how they work on the wheels.

fdegrove
Tubbie Guru
Posts: 5858
Joined: Tue May 03, 2005 2:20 am
Location: Belgium

by fdegrove

Hi,

The glue technique used by myself and my shop aren't compromised by adding any solvent or other chemicals.


How so? By adding other chemicals you effectively alter the chemical composition of the product so results would be unpredictable at best.

Ciao, ;)
Being a snob is an expensive hobby.

tmanley
Posts: 238
Joined: Tue Jul 25, 2006 5:53 pm
Location: San Jose, CA
Contact:

by tmanley

fdegrove wrote:Hi,

The glue technique used by myself and my shop aren't compromised by adding any solvent or other chemicals.


How so? By adding other chemicals you effectively alter the chemical composition of the product so results would be unpredictable at best.

Ciao, ;)


How so? I know adding chemicals is a no-no. I was just clarifying to the guy asking the question that nothing was altered in the gluing process. Myself and the shop both use Vittoria glue and that's it.

fdegrove
Tubbie Guru
Posts: 5858
Joined: Tue May 03, 2005 2:20 am
Location: Belgium

by fdegrove

Hi,

I see. The way I read it was that you were actually adding stuff and it was not compromising anything. Sorry. :oops:

Ciao, ;)
Being a snob is an expensive hobby.

User avatar
Kermithimself
Posts: 992
Joined: Sat Jun 02, 2007 12:48 pm
Location: Denmark

by Kermithimself

I have a set of tubulars that have been tufo tape on them. Now I want to glue instead of using tape, and the tubulars have tape residue on them. Do I need to clean this off, or can I just glue over it?
------------
If you dream of being famous - think of what birds do to statues.
Instagram: https://www.instagram.com/kermithimself/
Youtube: https://www.youtube.com/channel/UCdCPaXwpeXT_LpuEF0REjqw
Facebook: https://www.facebook.com/gotlegscycling/

Geoff
Posts: 5120
Joined: Sat Dec 13, 2003 2:25 am
Location: Canada

by Geoff

Typically, when you are changing glue types, it is preferable to remove the old glue first. While this is a pain in the butt with glue on the rim, it borders on impossible for the tire basetape.

To use a chemical remover on the basetape is kind of like cutting off your nose to spite your face. Short of replacing the basetape, I do not think that there is a practical way to do it. About all you can do is to mechanically remove as much tape residue as possible and re-glue the tire.

fdegrove
Tubbie Guru
Posts: 5858
Joined: Tue May 03, 2005 2:20 am
Location: Belgium

by fdegrove

Hi,

While this is a pain in the butt with glue on the rim, it borders on impossible for the tire basetape.


Using chemicals wouldn't be a good idea anyhow as these are being soaked up causing damage to the base tape's fibers in the long run.
Even on a rim that Tufo glue is a PITA to remove with the usual solvents. :roll:
Which makes me wonder if a heat gun might help soften it somewhat......

Ciao, ;)
Being a snob is an expensive hobby.

kevosinn
in the industry
Posts: 638
Joined: Mon Mar 05, 2012 7:28 am
Contact:

by kevosinn

Hey guys im getting a light set of tubie wheels and I need some ideas for tires. Im not going to be riding them every day but maybe on the sunday rides.....Im currently looking at the velo flex extremes but is there something that I could go with thats lighter and still decently reliable? Thanks in advanced.


Given there is a tubular thread, could you please pop requests like this in here. A new thread is not required.
Www.crypticcycles.com Custom carbon frames, bar/stem combos, repair and component tuning.


Post Reply
  • Similar Topics
    Replies
    Views
    Last post