Glueing tubulars [the tubular thread]

Everything about building wheels, glueing tubs, etc.
bahn
Posts: 30
Joined: Thu Oct 10, 2013 7:42 am
Location: UK

by bahn

I glue 25mm Veloflex Arenbergs & Conti Competitions to my ENVE 7.8 and have seen no problem with the seating of the tubular to the rim bed and it looks like a nice snug fit... thumb tested and always been stuck well and difficult to remove later on. Although the rims are wide 29mm/27.5mm I think the rim bed profile is well designed for 25mm tyres and that there is just plenty of rim material to make the rims wide.

The same is true for all glue jobs - if you don't seat the tubular straight and centred then you can find the tubular won't have stuck very well to the edges of the rim.

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Valy
Posts: 231
Joined: Tue May 29, 2012 11:16 pm

by Valy

Have not had much luck with this - what is the difference between aluminium and carbon gluiong tape?

Why can't aluminium specific tape be used on carbon rims?

by Weenie


Jugi
Posts: 564
Joined: Sun Jun 24, 2018 8:10 am

by Jugi

As far as I have understood, aluminium and carbon specific tubular glues do not have a drastic chemical difference. Usually the one meant for carbon doesn't provide as strong of a bond in small quantitys, but with a larger volume it just as strong.

As some rim manufacturers (I have seen disclaimers from FFWD and Zipp) do not recommend tubular tape for some of their carbon rims, I think a carbon specific tape could be ok to use on those rims.

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Valy
Posts: 231
Joined: Tue May 29, 2012 11:16 pm

by Valy

Okay. I am just concerned with using Al tape for carbon handlebars. I stick some foam bits under the bar tape to hold them in place!

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topt
Posts: 9
Joined: Fri Jul 19, 2019 5:13 pm
Location: Slovenija

by topt

a noob question, since I have never used tubulars before, do tubs also strech on a rim like clinchers, what would be the optimal rim width for aero for conti 5000 25mm?
thanks

Geoff
Posts: 5259
Joined: Sat Dec 13, 2003 2:25 am
Location: Canada

by Geoff

Absolutely. Tubulars stretch like crazy. I strongly recommend that you pre-stretch them on an old rim (put them on and inflate them to 110+ psi for a week and change before you glue them on your wheels. Some people say that Conti tires are 'tougher' to mount than some of the hand-made variants, but I have not personally noticed that.

I have run the Conti Comp 25s on Hed Stingers with no issues. I think that most 'conventional' tubular wheelsets can handle the 25s pretty easily. I have road tires as large as 27 and have never had a problem mounting them to a 'conventional' tubular rim (the issue being whether or not the rim bed and the basetape mate well, or if the contour of the rim no longer matches the larger tire circumfrence, as happens to 'cross wheels, necessitating the use of 'Belgian' tape to fill-out the gap.

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LouisN
Posts: 2761
Joined: Mon Feb 19, 2007 3:44 am
Location: Canada

by LouisN

topt wrote:
Fri Sep 27, 2019 12:23 am
a noob question, since I have never used tubulars before, do tubs also strech on a rim like clinchers, what would be the optimal rim width for aero for conti 5000 25mm?
thanks
Where did you find GP 5000 tubulars ??

LOuis :)

topt
Posts: 9
Joined: Fri Jul 19, 2019 5:13 pm
Location: Slovenija

by topt

I didnt, thought I would buy them but now I see they dont make them

Roadrocket
Posts: 165
Joined: Wed Aug 29, 2018 8:43 am
Location: Slovakia

by Roadrocket

I´d like to improve aerodynamics of my Bora Ultra tubulars, anyone tried to fill the gap between rim and tyre on the style of Mavic´s CX01? https://cycletechreview.com/2012/news/m ... isallowed/

Maybe stupid idea, but I was thinking about using some black silicone sealant, anyone has done it yet?

LewisK
Posts: 90
Joined: Thu Oct 31, 2019 2:11 pm

by LewisK

Hambini mentioned this in one of his videos. Basically using silicone to smooth the area between the tyre and wheel. Same as what Mavic did!

Roadrocket
Posts: 165
Joined: Wed Aug 29, 2018 8:43 am
Location: Slovakia

by Roadrocket

Cannot find that video. Can anyone describe the procedure and what silicone to use?
I´ve never done it before but will certainly try it. Mavic´s system looks clever and makes sense so why not take an advantage from it...

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