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PostPosted: Thu Aug 14, 2014 3:52 am 
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Joined: Tue Dec 04, 2012 3:57 am
Posts: 92
thechemist wrote:
Kayrehn wrote:
Sometimes the rubber casing gets in between the gap - try to pry ad widen the area around the stem first. If you're using a long stem for deeper rims, I'm amazed you managed to get the stans sealant in at all!



Well I haven't glued the tire back on yet so I will go check around the casing and make sure the stem is easy access.

I am using zipp 404s but once I took the value stem off I just put the sealant in the valve stem hole?


You can use a Maxxis MVS valve extender to replace the red Vittoria valve, they're interchangeble. Maxxis extender's core is removable, so it's easy to fill sealant.


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Posted: Thu Aug 14, 2014 3:52 am 


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PostPosted: Tue Sep 23, 2014 10:06 pm 
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Joined: Mon Sep 26, 2005 8:06 pm
Posts: 209
Have I just screwed up royally?

I've just gone back to tubs. As part of the preparation I bought a light Tufo tub and some Tufo tape to carry as a spare under the saddle. Having read what I thought were references to pre-taped spares here, I applied the tape to the tyre, then folded it up.

Now watching. Youtube, it seems that the tape goes onto the rim. Does the tape really have a rim and a tyre side? If I'm just using it to get me home, does it make a difference?

And if I have to do a roadside change, it looks like I peel a small bit of tape cover off either side of the valve, mount the tyre, inflate it, *then* pull out the tape cover from between the tyre and the rim. Right?

I'm sure this is all fairly simple, but it doesn't seem simple right now...


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PostPosted: Wed Sep 24, 2014 9:50 am 
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Joined: Fri Dec 24, 2010 9:37 pm
Posts: 584
Location: it's raining, it must be uk
is the normal tub glued? if so, you just pre-glue the tufo spare, that's what i do, then when required you pull the flat off and fit the tufo, it should stick well enough to get home on (but i avoid heavy braking/hard cornering)

glue, let it dry, fold it basetape to basetape, secure with a rubber band and keep it in a ziploc bag/whatever to protect from rain/sweat/dirt

the glue will eventually lose tack, i reglue the spare every year or so


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PostPosted: Wed Sep 24, 2014 12:07 pm 
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Formerly known as wassertreter

Joined: Tue Apr 12, 2011 8:08 am
Posts: 2017
Location: Pedal Square
Greg66: I've been using an unglued spare with tape-glued tyres. The two or three times I had a flat, there was enough of the tacky stuff left on the rim to get me home with the unglued spare.

Yes, tape goes on the rim.

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Bikes: Raw Ti, 650b flatbar CX


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PostPosted: Wed Sep 24, 2014 2:25 pm 
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Joined: Mon Sep 26, 2005 8:06 pm
Posts: 209
Ok, thanks. Sounds as if I've made a moderate horse's arse of it, but not so bad that I won't be able to get home on it. Which is all that matters. I can sort it out properly after that.


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PostPosted: Wed Sep 24, 2014 6:17 pm 
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Tubbie Guru

Joined: Tue May 03, 2005 2:20 am
Posts: 5796
Location: Belgium
Hi,

Quote:
Does the tape really have a rim and a tyre side?


No, it doesn't but having the tape on the tub instead of the rim bed is just not that practical.

If you're current tub is simply glued on using rim cement I wouldn't bother with the Tufo tape on the spare.
If OTOH you already use Tufo tape on the current set up then good luck getting the tub off.....

Ciao, ;)

P.S. Two things I try hard to avoid when cycling: Tufo tape and Tufo tubs (I'd rather go see my dentist).... :mrgreen:

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PostPosted: Wed Sep 24, 2014 10:40 pm 
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Joined: Mon Sep 26, 2005 8:06 pm
Posts: 209
That's the price of being a newbie!

The wheels have a mismatched pair of tyres right now - a Conti 4000 and a Vittoria of some description. Both look to be glued.

The idea is to use the Tufo just to get home, then remove it and either repair or replace the punctured tub. The Tufo will back in the saddle bag for the next puncture.

Sounds like I should be able to make it home, at least.


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PostPosted: Wed Sep 24, 2014 10:52 pm 
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Tubbie Guru

Joined: Tue May 03, 2005 2:20 am
Posts: 5796
Location: Belgium
Hi,

I'd still peel off the Tufo tape from the spare and just pre-glue it with regular rim cement just the same.
Using the spare with the Tufo tape may make it pretty tough to remove it afterwards. Both tape and tyre that is.

Ciao, ;)

_________________
Being a snob is an expensive hobby.


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PostPosted: Tue Sep 30, 2014 10:50 pm 
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Joined: Mon Sep 26, 2005 8:06 pm
Posts: 209
fdegrove wrote:
Hi,

I'd still peel off the Tufo tape from the spare and just pre-glue it with regular rim cement just the same.
Using the spare with the Tufo tape may make it pretty tough to remove it afterwards. Both tape and tyre that is.

Ciao, ;)


Took this advice. Tufo tape now securely screwed into a ball and in the bin. Phew!

Different question entirely: Zipp 404/808 FC tubs are wide: 26-27mm. What good tubular tyre comes in a width to match that?


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PostPosted: Tue Sep 30, 2014 11:17 pm 
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Tubbie Guru

Joined: Tue May 03, 2005 2:20 am
Posts: 5796
Location: Belgium
Hi,

The width of the Zipps is measured where exactly?
What matters is for making a choice of tubular tyre width is the width of the rim bed. I.e. say it measures 21mm then you can use a 21mm wide tyre and wider. never narrower than the measured width.

Ciao, ;)

_________________
Being a snob is an expensive hobby.


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PostPosted: Wed Oct 01, 2014 8:46 am 
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Joined: Mon Sep 26, 2005 8:06 pm
Posts: 209
fdegrove wrote:
Hi,

The width of the Zipps is measured where exactly?
What matters is for making a choice of tubular tyre width is the width of the rim bed. I.e. say it measures 21mm then you can use a 21mm wide tyre and wider. never narrower than the measured width.

Ciao, ;)


Good question. I was look here: http://zipp.com/wheels/808-firecrest---tubular/# under "Specs".

Brake Track Width (center) 26.04mm
Max Width 27.5mm


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PostPosted: Wed Oct 01, 2014 1:53 pm 
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Tubbie Guru

Joined: Tue May 03, 2005 2:20 am
Posts: 5796
Location: Belgium
Hi,

The specs would suggest anything as wide as 25mm and upwards.

Ciao, ;)

_________________
Being a snob is an expensive hobby.


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PostPosted: Sat Nov 08, 2014 4:38 pm 
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Joined: Wed Jan 12, 2005 6:04 am
Posts: 471
Location: USA
I've found that the adhesion for Tufo Tape is not nearly as good as Mastik glue. There is such a difference that I will continue to use Mastik.


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PostPosted: Fri Nov 21, 2014 1:09 am 
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in the industry

Joined: Sat May 12, 2012 7:25 pm
Posts: 1591
Location: Glermsford, Suffolk U.K
By the time my tubs with mastik 1 glue have set I cannpt remove with my hands alone. Levering the tub of with a tyre lever is the only way. Thats how good this glue is. A tub never moves with it. I have yet to find the spare tubs popped on at the road side moving either. The last spare I had to pop on I did in the end re glue after a few weeks but after having difficulty pulling the spare tub of I have to wonder why I bothered. Mastik1 is brilliant stuff.

I do put three layers of glue on the rim and a layer or two on the tub it seems to create a very firm bond.

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Posted: Fri Nov 21, 2014 1:09 am 


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PostPosted: Wed Nov 26, 2014 4:46 am 
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Joined: Sat Feb 25, 2012 10:01 am
Posts: 246
Location: Kuala Lumpur, Malaysia
Hi,

Having just converted myself into riding tubulars, I'm just curious what is the general consensus on measuring the life of a tubular tyre? Do you go by miles ridden, time (weeks, month, year..) or just by looking at the wear of the thread?

And if so, when is the time to change a new tubular?


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